Powerglide gear ratio calculator


The 1964 Chevy Corvette was greeted with as much enthusiasm as its 1963 counterpart had been the year before. Solve for your Crawl Ratio. Working out the tooth counts for planetary gears is actually not that complicated, so I initially neglected to mention how to do it. Hope that helps a little Selecting a rearend gear ratio (ring & pinion set) to provide the desired highway cruising speed, 60—65 MPH, for a modern hot rod. So im a bit lost when it comes to 6R80 gear ratios in the 2014s. [ BACK ]. A good overall (first gear x final drive) ratio of about 10:1 is needed for good take off from a dead stop. RPF takes everything into account, from the crankshaft to the tires on the road. The bracket racer has a choice from two gear ratios from the factory — 1. BTE072473 . You have to count teeth and use a calculator. Check the theoretical vehicle speeds, RPM drops . They are even used in tractor-pull vehicles with the proper modifications. Transmission Ratio RPM Calculator. 273 RPM because the high gear is 1. In the example of a four speed, the case nearest the engine would contain a 1. no need to enter anything in '6th' gear for a car with only 5 speeds). Enter the number of teeth on Enter in the fields and click the "Calculate" button to view your results. Emergency Service Horsepower Calculator; Worm Gear Torque Ratings; Ratio & Center Distance; Request for Quote & File Upload; Standards & Toloerances; Gear Tooth Dimensions; Gear Types. 00, n/a, n/a, n/a. i'm looking at a nice 71 chevy vega panel wagon with a solid roller 406sbc, 5800 stall converter , powerglide , 9" ford w/4. When you lift your 4x4 truck you consider your options for lowering the overall gear ratio. 76 or 3977. We run a Pontiac Grand Prix Metric car with 7. FTC Part #: 28-1: Price: $350. so long as the trans is not an overdrive the final gear is 1:1 so it really deosn;t matter what kind of trans you have. Powerglide Gear Sets for 2. When i use a calculator linked on the forum here, i get a drastically different rpm @ 65mph than i do using the American Muscle chart. e. 6th ratio: Tire: 155 165 175 185 195 205 215 225 235 245 255 265 275 285 295 305 315 325 335 1101 W. Drive Gear Teeth - Number of teeth on the transmission side of things Rear End Ratio - Rear Gear Ratio (3. 76 gear set. Two of the key reasons for its popularity were the improved fuel consumption and the 3. com and Wayne Clayton. Part Number: TRA-150 You must multiply each cases underdrive ratio in order to determine the first gear ratio. Your car probably had a 370 rear end in it from the factory. You can also now calculate when using different transmission gear ratios, like in first gear or in overdrive. SONNAX POWERGLIDE PLANETARY GEARSET 222085 . 51, 4. It's a 19 tooth gear and my speedometer is 10 MPH slow. 5” I do not have the part number for it so I cant determine the ratio, -----· Please check the photos; I take photos of the exact item that you will get Changing to a Tremec TKO 500 manual transmission—which has a 3. 08, 4. I have a stock powerglide and was wondering what gear ratio first gear is. Another good friend (Don) had recently asked if i knew what the high gear ratio was in a powerglide. 00, n/a. 68, 5. The numbers used as a default for the first set are what I currently have in my 1967 El Camino; a TH350 transmission, 235x60x15 tires, and a 3. Can someone tell me how to determine what exact gear ratio I have on my car? (1957 Chevy Bel Air Sport Coupe) I think its 3. 78 to 1 ratio allows you to go to a numerically higher rear gear to improve your 60ft. 82 ratio and was used by Holden in Australia behind their Australian built 6-cylinder and V8 engines. 08's were the most common gear for Camaros, except when they came with powerglide transmissions, like your father in law's car. It is a good idea to replace your speedo drive clip each time the gear is removed. 82 stock replacements designed for street use in small block applications. 52 first gear and 1. In addition to the ring and pinion gear ratio in the axles you may consider other options for your transfer case and transmission. 2. If the Split drops then increases as it does with some overdrive gears, the gear will feel "too tall". The defaults show suggested values. Here's my rule of thumb. The overall demultiplication of multi stage planetary gear units is calculated by multiplying the ratios of the single stages. Using the correct auto ratios with 3. 30's will put you at 6000 crossing the traps according to a calculator, but you should pull more mph so take that into consideration. Popular Transmission Ratios - use for input below ( M21/M22), 2. 80 Straight Cut Low Gear Set is Rated Up To 2,400 hp. The five speed option is for the last gear of a transmission greater than four speeds. The gear ratio in this case will be 1/(1 + N r /N s) which can also be written as 1:(1 + N r /N s). Powerglide (big blk), 1. Tire roll out is between 79" and 80". 89, 3. 11 gear ratio, high performance fuel pump, and a 1970’s style TH350 transmission. If you would like to find a value other than speed, fill in information for all the boxes and clear the valu in box you would like an answer for. The number of teeth of the planets has no effect on the ratio. For highway cruising, I'd try to keep the RPMs around 2200 or lower if you can. 00 USPS US Shipping on Speedometer Parts Under 1 Pound *** Speedometer Calibration: Variables such as the vehicle’s axle ratio and tire diameter affect the accuracy of the speedometer. 80 ratio, Short, 4340 Material Powerglide Planetary It's very easy. You can also use a different tire height to see how it affects the SLR (see the effects of tire height change without changing the rear gear ratio) Starting Line Ratio Calculator (Note: The calculator converts under the assumption that one unit of the gearbox is fixed (sun, planet carrier and annulus gear), therefore does not rotate). It’s not as aggressive as the 4L60E though, which has a final gear ratio of . ford racing sells a 8. Re: Powerglide or 3 speed? November 23rd, 2012, 10:34 PM 4. For example: A second line of data that reads "3L08 88 ***" would be a gear ratio of 3. What is the optimum gear ratio for your application? To help you determine this Mark Williams Enterprises offers a handy plastic gear ratio calculator. 36:1. If you switch to a Powerglide 2 speed automatic, you can go about 70 MPH in first, but it's not much fun to drive. Speed   Enter Gear Ratios, Tire Diameter and Diff Ratio or Sprocket Sizes to Calculate MPH and Shift Points with trace. Here is how this works. 20). 30s and an average tire you will be at 5500 rpm in third gear going 75 mph (your approximate 1/8th trap speed). Main Speedometer Gear Page, Click Here. The Powerglide, RPO M35, was the optional 2-speed automatic transmission for the Camaro. 55 and you get 3. If the ring gear is held stationary and the sun gear is used as the input, the planet carrier will be the output. Since S1 is being held, P1 is driven around S1 along with the carrier and output shaft. You need to know where the engine powerband starts and The big difference is the first-gear ratio. You can change tire dimensions to calculate the effect on top speed and gearing. Rialto, CA 92376, USA 909 605 1123. Powerglide two speeds came with 1. Input is provided through sun gear S2 (center gear). 00 as this is the typical 4th gear ratio of most 4 sp and 5 sp manual transmissions. Sonnax Powerglide Transmission Parts Catalog, Vol. The 4L80E has an overdrive gear with a ratio of 0. I'm running a 6. Selecting the right torque converter for your automatic transmission can make all the difference in how your drag race or street/strip vehicle performs. See the chart below the table for typical ratios. This calculator will provide the speed of the vehicle based on the transmission gear ratio, the engine RPM, the tire height, and the ring gear and pinion gear ratio in the rear end axle differential housing. Here is a quick tire size vs gear ratio /speed calculator that is easy to use. Use our gear ratio calculator to find the effective gear ratio your vehicle will have with a new tire size. Replaces original GM part number 3987917 perfectly. #PG1. Planetary gear ratio calculations This article also available in Spanish. All materials, both visual and written, are property of RACE-TRACK. 97 x 3. Even better if its prefilled with 32/33 GTR ratios STREET PERFORMANCE CALCULATOR. 00 USPS US Shipping on Speedometer Parts Under 1 Pound *** Speedometer Calibration Variables such as the vehicle’s axle ratio and tire diameter affect the accuracy of the speedometer. In terms of taking off from a dead stop, the 700-R4 clocks in with a 3. Style. F2540L: 1. 73, 3. The adapter material is 356 T6 heat treated aluminum alloy. 31 gear ratio I was thinking of a 9 tooth drive gear but now I will go back to the speedo calculator and check for the 3. speed as you go through the gears. I need a 16 tooth according to the TCI transmission websit but they don't have anything other than 19/20 tooth's. If you do not know this ratio, you can simply put in 1. net website for your personalized autographed copy. 08-to-1, a ring gear size of 8. This is a superior alternative for most cars thinking of going to a Th400. 37 ratio planet gear set. Use this calculator to determine your gear ratio and vehicle’s speed in any gear and any engine RPM for best performance. Using the charts below, you will be able to learn alot about the rear differential in your classic full size Chevy. It will help you to find the best gear ratios for your racing car and to understand when it is the best time to change a gear. The car is in the final stages of paint,then reassembly begins. com. 70:1. Will not work for automatic turbo 400 transmissions. before getting the possibility of the 3. Welcome to Bowtie Overdrives, home of the worlds finest GM Automatic Overdrive Transmissions. 64, 1. 23, 3. You can count the ring teeth and divide by the pinion teeth for the ratio. It seems to me that the 3. Table below: Shows table of all possible chainring/sprocket combinations with gear ratio. 07 gear is basically the equivalent of a 20 percent lower rearend gear, which directly results in better 60-foot times. 48 x 1. For example, the default figures in the chart are for a stock ratio transmission as fitted to a Type 1, 1303S (3. Holden vehicles fitted with Chevrolet V8 engines used the 1. 22 final at a 3/8, rpm is about 6800-7000, granted its in a street stock, tire size is 83 inch. A transmission, transfer case or gearbox from SCS Gearbox will be a step in the right direction both for your vehicle and for your success. Transmission Gear Ratio Equation and Calculator Mechanics and Machines Calculations Menu The following equations and calculators will estimate the resultant vehicle speed at a known engine rpm for a manual transmission with up to six forward gears. YUKON ADVANTAGE: CALCULATORS DIFFERENTIAL / GEAR RATIO CALCULATOR, TRANSMISSION GEAR RATIOS Powerglide (sm. This chart has been revised with actual ratios Powerglide Adaptor Plates Bands and Band Apply Hardware Bushings and Bearings Cases Extension Housings and Components Dip Sticks and Tubes Filters Friction Plates Gaskets and Rubber Components Gear Sets Governor Support/Rear Pump and Components High Clutch Drum and Components Input Shaft Metal Clad Seals Miscellaneous Items A Powerglide transmission in combination with a numerically high gear ratio is a good choice for quarter-mile cars or performance engines that live in the upper rpm limits, and also for street-worthy muscle cars that have very broad power bands. Now my next question would be, what is the current converter slippage? You can also now calculate when using different transmission gear ratios, like in first gear or in overdrive. this means that dimension "C" is usually longer than dimension "B". Also, for further gear choices, you could swap transmissions. Please note a lot of other shit like converter slip comes into play, but this will get you in the ball park. Enter your 1/4 mile race car's information into our calculator to see how well you will perform. 98]. Large Animated Gauge Diagrams. Lenco Transmission Overview. Per their sit each tooth is about 2mph taken away are added. If you want good street performance, I would keep the overall ratio at 10-12. The high-ratio “L2″gearcase ( 2008-2010 ) displays the line at the 9:00 position signifying that it is a 1. Correct speedo gears will allow your speedometer to read properly. ) Tire Height - Please use Inches when measuring Most of the V8/Powerglide transmissions came with the 1. But the Powerglide was typicly used with around a 3. 10, 4. Brek is right When I did my drag car I went with 4. If a car has less than 6 speeds, only enter gear ratio numbers for the gear ratios that apply (i. The 20 and 21 tooth Powerglide gears have a . Although neither remains in production today, they are still heavily used on the drag strip circuit as replacement transmissions for 1960s and 1970s vintage cars. This powerglide transmission is designed for high horsepower applications in vehicles that require the "standard" or "shorty" length. Use the links above to gain access to all the other Racing Calculators GitDirt. 69 ratio powerglide gear set for shorty transmissions. 91, 4. 08 & 2. 70 1/4 mile ET . Co-authored with Rick Nelson of Musclecar Restoration & Design . That is the transmission first gear ratio multiplied by the rearend ratio. BTE is the industry leader in powerglide gear set design and manufacturing. 71 ratio or . He said the guy had put a very tight converter in the car and the Dyno and the guy's data logger were showing more driveshaft speed than engine speed on both units. Enter Gear Ratios, Tyre Diameter and Diff Ratio or Sprocket Sizes to Calculate KPH and Shift Points. 42, 3. Racing Auto Transmissions from Street to Strip / Pro Mod. PowerGlide, 4. Note: The mounting pad is usually a part of the extension housing, but the graphic shows it on the maine case. SPEED CALCULATIONS If the gear ratio is known it is easy to calculate a theoretical top speed along with propeller efficiency if the actual boat speed has been measured The General Motors Turbo 350 and Turbo 400 automatic transmissions are perhaps the automaker's most popular ever produced. The 1964 serial numbers are found on the bottom of the carrier. 0 rear axle ratio back in the 1960s. 88 final gear ratio. The next steps depend on the state of the planetary gears connected to the carrier, although all use the same formula. You need 3. 1964 C2 Corvette 1964 C2 Corvette Overview. Moving your mouse over the ratio will show speed you will achieve by pedaling at 100 rpm. The adapter material is 356 T6 heat treated aluminum This chart is particularly useful when used in conjunction with an engine’s power and torque data – showing what the rpm drop is in each gear when shifted at a specific engine rpm. 73's you should hit ~62 before going to 3rd with a 7k redline. Ring-and-pinion selection made easy! Save yourself the headache and let us figure out your ring-and-pinion gear ratio! Just type in your info (example: 5000 RPM), press calculate, and you’ll get the right ratio without the guesswork. 31, 3. com Enter the maximum potential safe engine RPM. 76" - GM #3708145. Let's be honest - sometimes the best gear ratio calculator is the one that is easy to use and doesn't require us to even know what the gear ratio formula is in the first place! But if you want to know the exact formula for calculating gear ratio then please check out the "Formula" box above. 23 Mount Erin Rd, Blair Athol NSW 2560, Australia 02 9607 2299 Gear Ratio Calculator. Speedometer Gear Calculator, Click Here. The 1962-63 serial numbers are located on the front, right side of the differential carrier. 09. 56). The second line of data indicates the gear ratio, ring gear size, and differential configuration (open or limited slip). NEW! Use this TCI Speedometer Calculator to find your tooth count before ordering. 82, 1. manufacturers high quality performance car parts, transfer cases, quick change gears, gear boxes, & more. 98 first gear ratio [3. The starting-line ratio is a combination of the first-gear transmission ratio multiplied by the rear-end gear ratio. 75:1. The Split should be the same gear to gear or decrease slightly. 07 first gear, as opposed to a 2. There were only two gear ratios used in the aluminum Powerglides; four- and and manual transmissions are included in our transmission dimension chart,  Transmission Gear Ratio Chart ~ Gear Ratios are listed for many popular transmissions. 36 x 3. Makes a great gift! Rear Axle Assembly Codes The rear axle ratio may be determined by finding the two- or three-letter serial number prefix in the following table. ) Price is for one gear. 0:1. 31 ratio gearset. 4. 00 rear gear gives you an overall final drive ratio of 3. 23 Apr 2003 Read Chevy High Performance magazine's technical article on calculating gear ratios. A web based calculator to help you pick the right size tires, wheels, rear end, gear ratio and transmission for your 55-57 Chevrolet Heartbeat City stocks a full line of NOS Camaro Parts, Rare Camaro Parts, Old Camaro Parts, Reproduction Camaro Parts and hard to find Used Camaro parts for your first generation 1967, 1968, 1969 camaro. 76 planetary powerglide we're shifting at 7000 RPM. Exact fit for all automatic powerglide , turbo 350 and saginaw or muncie manual transmissions. Gear Ratio And Tire Size Calculator When you change your tire size you need to make sure you have the right gearing to get optimal fuel economy and power. 56 with 9 x 28” M/T slicks car started with a 304 w/big cam & auto w/4000 stall. With Gear Ratio Calculator you can see the theoretical top speeds in all gears. 11, etc. the rear end ratio depends on the size of tire you are running as well as the type of torque convertor example if you are running a 3500 stall and 26 inch drag slicks the you probably would want to run a 3:90 gear there is many sites out there that can help you figure out what you want to run for a rear end ratio to get the most from your vehicle Ok I checked it out on the gear ratio/mph calculator at F-body. I am unsure of the stock gear ratio in it,all we did last year is install a mini spool. Last but certainly not least, you need to consider whether your vehicle will benefit more from a performance gear style or a pro gear style. In that case, 2. 5 rear end. Coan Engineering provides “A Winning Combination” of performance transmission components and torque converters to racers across the globe by implementing the most advanced design and manufacturing techniques in the industry. The model is built in two steps. Planet Teeth. 82 low gear Powerglide mated to a 4:11 rear end would  RPM Calculator. Newbies tend to think, “okay, all I need is a huge motor, a manual transmission, some decent tires and a way to stop and I’ll be good to go. Speedometer Gear Sales, Click Here *** $3. 3 and that is hard to find unless you do as Jim suggested and hunt down a donor rear for the gears or buy new gears with the ratio you need. If you know your gear ratio and tire size you can get a fairly close idea here. This will help you pick the right size tires, transmission and gear ratio combination for your classic. Horsepower Calculator; Worm Gear Torque Ratings; Ratio & Center Distance; Request for Quote & File Upload; Standards & Toloerances; Gear Tooth Dimensions; Gear Types. The equation for Horsepower is: Horsepower = Torque X RPMM/5252 Gear Splitting gives you more torque multiplication and higher rpm on shift On an involute profile gear tooth, the contact point starts closer to one gear, and as the gear spins, the contact point moves away from that gear and toward the other. Third, fourth, fifth, and sixth should be evenly spaced to allow a smooth acceleration. A 3. 00:1). Enter the number of teeth on the Ring and Pinion gears and click the "Calculate" button to view your results. 27 transmission first gear ratio multiplies providing a 10. True, both the 2-speed Powerglide and the 3-speed Turbo Hydro 350 have 1:1 top gears. 88 ring and pinion). It tells you how many revolutions the crankshaft turns to move your car one foot. Due to the lack of suitable cores‚ supplies may be limited. Min ratio: Ratio of the lowest gear of your setup. A real accurate way to determine your tire diameter is to draw a line on the bottom of your tire, then draw a line on the ground which lines up with the line you just drew on your tire. 27 first gear ratio and . At 75mph my current engine speed in 3rd gear is approximately* 3200 RPM. 00 Understanding Torque Converters. 18 Ratios These Specialty Ratio gear sets are for SB cars only, lightweight cars such as dragsters, or low torque, high RPM combination cars. 00, 1. The GEAR VENDORS. 52 in a T350. Notice with your rear gear in 1st-overdrive how low you would have to go in a new rear gear to make 2nd gear have that much torque multiplication. 41, 2. 8-inches, and the "L" in the first four digits indicates a limited slip differential. It is a fairly simple exercise but it has some twist. Then, change Richmond's performance gear ratios and beat your  The M-W gear ratio calculator can also provide a vehicle's speed for any given tire For example, a 1. the vega right now runs 6. Spur Gears; Worm Gears; Helical Gears; Splines & Shafts; Worms; Bevel Gears; Miter Gears; Change Gears; Spiral Bevel Gears; More Custom Gears; Services. 58 ratio Extreme planetary assembly kit 28158G-06SP delivers tunable control right at the start, when traction can make or break a race. One notable exception was the export version of the transmission, which offered only the 1. Ratio Adapters, Housings, Cables, Odometer Gears and Transmissions 1. 785″ diameter head and the 22, 24 and 25 tooth three speed standard gear has a . com offers free! Update the input boxes as needed and hit calculate to see result. The driven gear is positioned in a removable housing that is typically located in the transmission's tailhousing. All PATC torque converters are spin balanced and leak tested. in part, but remember it isnt just the first gear ratio, but the overall final drive ratio you need to concern yourself with. The middle case would also contain a 1. 33 rearend. Lenco offers an extensive variety of transmissions. 36 rear axle gear ratio coupled with the 3. The same is true of the transmission final gear ratio. 08 rear end (or even numericly lower) for a lower cruising speed. Motor made 1550 on dyno but et/mph calculator says more like Or a 1955 Chevy 2 door hardtop which weighs about 3,350 lbs. 73's were standard. 08 is a little too high to run with the powerglide, considering that the powerglide has an extremely high "low" gear ratio (1. The gear ratio is perhaps one of the most overlooked aspects of modifying a car. Determine your engine's RPM based on the transmission gear ratio, tire height, MPH and the  Calculators appear courtesy of Mark Williams Enterprises. 88 rear axle ratio with stockish size tires. A new speedo drive clip is included. 00. At last glance there are nearly 40 ratios available in standard 9" size, with many of the more popular ratios offered with a 9-1/2" ring gear, which can be accommodated in a 9" housing. I was messing with the 64 today and decided to check the speedo gear in the power glide. Powerglide Planetary Gear Sets by FTI Performance. Lets say we have a 1. I don't know if a B&J use compound planetary gears or single planetary gears. Correct purple color and 17 tooth design. If you need help choosing a gear ratio, Summit sales reps can help or you can use the Gear Ratio Calculator on Summit’s website to narrow down your choices. 5s in 2nd. 76 first gear in V8 crs and 1. 10 final gear ratio x 336) / 30-inch diameter The "Split" is the ratio of this gear to the previous gear. 30 x 1. Scroll through the list of popular transmissions to find yours. 6th Gear Ratio Calculator requires a subscription . NEW BTE Top Dragster Racing Powerglide Transmission 1. Your email address will not be published. See Also: Transmission Cross Reference Database GM Powerglide. If you do not Powerglide, 1. The GEAR VENDORS in combination with the Powerglide is an affordable, reliable, and very efficient package. This calculator will graph RPM vs. Example: 2. New OEM AC Delco gears are used in Muncie, GM T10, GM Super T10, Saginaw 3 & 4 speed, GM T5, Powerglide, 200 & 350 transmissions. You need to know your rear end gear ratio. GM Powerglide, 1. What would you do to improve our website? We're always looking for ways to improve JEGS. Gear Ratio Calculator. Everything from performance torque converters for drag racers, mud racers and street enthusiasts to racing transmission pumps, powerglide gear sets and deep transmission pans, you can count on FTI for all your transmission needs. Use the RPM calculator to determine what RPM your engine will run based on gear ratio, tire diameter, transmission and MPH. Gears and Transmissions 2. It was available on all first-generation Camaro models except the SS396 and the Z28. Where To Buy Share. 37 planet gear set. 82 R. 70, 3. 76, 1. These charts should help you narrow down the selection of the proper gear combination to use in the transmission and speedo cable to 'get you legal' again. Requires an HTML 5-compliant browser. A question that I often get is how to work out planetary gears using the gear template generator. We manufacture all types of gears and machine parts in just about any material to suit your needs. Or, change input variables (engine RPM, axle gear ratio and tire height) to determine vehicle speed in each forward gear. 76 and 1. This is my favorite way to identify a poorly designed converter or one that's not right for the car. See this new video on how we manufacture all of our powerglide gear sets. tion, that section shifts into high gear (1. 76 low gear, the company’s custom E9310 gearset (part number HP7469L, which includes a forged carrier housing and ring gear, 9310 pins and new washers and needle bearings) and one with 4140 gears (part number HP7479L, which includes an OEM carrier housing built with new washers and needle bearings). Solve for your Transmission Ratio. 10, the engine speed will be approximately 2,984 rpm--(65 mph x 4. RPM/MPH From Gear Ratio Calculator - by Wallace Racing Home of Pontiac Powered Firebirds,Trans Ams,Pontiac Powered Dragsters,Pontiac Power Rules! Starting Line Ratio Calculator Wallace Racing BACK to Calculators Use this calculator to see what your starting line ratio is. Powerglide Adaptor Plates Bands and Band Apply Hardware Bushings and Bearings Cases Extension Housings and Components Dip Sticks and Tubes Filters Friction Plates Gaskets and Rubber Components Gear Sets Governor Support/Rear Pump and Components High Clutch Drum and Components Input Shaft Metal Clad Seals Miscellaneous Items 1. With the monumental success that Chevrolet had experienced after the introduction of its second-generation Corvette Sting Ray. We compiled a list of specs for many of the more common transfer cases that off-roaders use, swap, or modify. 56, 2. Earlier explorers have drum brakes and later ones have disk and the late models have IRS but the carrier is still the same. _____ Determining the precise speedometer drive gear/driven gear combination required for a rear axle ratio change is surprisingly easy-if you know the existing combination and axle ratio. But, driven by power levels, gear ratios, and race distance to some extent, the Turbo 400 has found new legs as a two-speed, just like its GM cousin, the Powerglide. Makes a great gift too! 1101 W. Made in the USA, BTE has gear sets available in multiple lengths and ratios. Rev/Mile: Rev/Mile is engine revolutions per mile, which is rpm at 60 mph. 76 ratio gear-set. It was a popular option in 1967-68 since it was the only automatic available for L6 and small-block V8 cars (Z28 and a few very-late 68 TH350 experimental builds excepted). DRAG RACING Powerglide. This calculator does not take into consideration any drive train loss, road Hello everyone, I'm thinking about changing the low gear ratio in my powerglide used for bracket racing. 97 first gear with a 3. 55 rear Th350 will grab 1st-over like 4. These calculators are designed to give the approximate engine RPM (revolutions per minute) based on the ring gear and pinion gear ratio, the height of the tires (diameter from ground to top of the tire while mounted on the vehicle) and the transmission final gear ratio. The speedometer accuracy is maintained by selecting the correct size driven gear fitted to the gearbox end of the speedo cable - each gearbox has a number of different sized (and colour coded) gear combinations available to suit nearly any combination wheel and differential variations. Rialto Ave. Welcome Tutorial: Calculation of a planetary gear train This tutorial shows the usage of MESYS shaft calculation with shaft systems. This chart has been revised with actual ratios Engine RPM, or the speed at which the engine turns, can be calculated at any speed given the vehicle's tire size, axle ratio, and final transmission gear ratio. A two-stage planetary gear stage is defined using the program. Duplication, replication, or other un-authorized use of this web site, or materials within are strictly prohibited. The 4L80E keeps doesn’t drop the engine rpm as much between shifts because it is a heavy duty transmission and assumes that you could very well be pulling a load. ln general, all Lenco transmissions are a planetary design. Gear Ratio Calculator › The Powerglide to the GM NP 208 / 241 transfer case adapter is 2. 28, 1. The aluminum Powerglide, at less than 100 pounds, is ideal for racing applications. 8 rears use the same size carriers regardless of gear ratio or LS. Mike Mitchell is right that you'll want to change the gear oil, but it can be hard to get a count on the pinion with the diff in place. 7 probably won't help that much with your tiny for a truck tires though. Ring Speed. In first gear each case section is in reduction, providing whatever ratios they contain. Gear ratio and RPM Calculator: Instructions: Use this calculator to estimate various aspects of your performance. com online experience. stay with a 4. A list of the 4x4 gear ratios used in popular transfer cases and transmissions. com Calculate the theoretical 1/8 Mile ET, 1/4 Mile ET, 1/4 Mile Top End Speed, and Ideal 1/4 Mile Gear Ratio for a given application based on the Vehicle Weight (in pounds), Vehicle Horsepower (at the flywheel), RPM through lights (finish line), and Tire Diameter (Height) in Inches. A second automatic transmission, Turboglide was optional. Plan Axles Custom Axles Cases & Spider Gears Dropouts & Pinion Supports Kits Spin Free Kit Positractions & Lockers Ring & Pinions Spindles Spools Tools Yokes Yukon e-Catalog Product Comparison Charts Description. 82:1 first gear. Can anyone tell me how I can find out? Crawl Ratio Calculation Basics. We run a TH 350 tranny with 2. If you are looking for  Sonnax offers top-quality planetary gear sets and assemblies in four ratios and three performance levels for GM Powerglide transmissions. 80 ratio, Long, 4340 Material Powerglide Planetary F2540S: 1. We build to your specification. This calculator assumes you know the vehicle's transmission ratio. Hughes Performance® HP2211EBRX valve body TH400 billet aluminum valve body reverse shift pattern (P-R-N-1-2-3) with engine braking Tech Talk A video series to explain the basics of a torque converter, how they are built, the parts inside a torque converter, and general overview of how a torque converter works. Planetary transmissions rely on a central sun gear to provide a 1:1 direct drive ratio once shifted from the launch ratio. . 91 step up the rear gear ratio to say 3. Tire diameter, transmission choice (with or without overdrive) and desired highway cruising speed. Calculate gear ratio by dividing the number of teeth on the driven gear by the number of teeth on the driving gear. Ratio of the highest gear of your setup. Tranny/Rear Gear, 2. The rear case a 1. 64 0r 1. If you are looking for help with restoring or hot rodding your chevy classic a good place to go for help is Chevy Talk my favorite forum is 1955-1957 ( Modified / pro street / show) forum. Buy ACDelco 3860345 GM Original Equipment Automatic Transmission Green Speedometer Driven Gear: Power Steering - Amazon. 12 X 38" = 4. Basically, the ratio is determined by the number of teeth on each gear wheel. This means that your new RPM will be 7000*1/1. Your ratios are the MT82, which is why I ended up with 3. So if you have a 3. E. Gear Ratio Calculator. If you take a few moments to study the gear chart for your transmission and rear end ratio combination you will see why this product is so popular. This input is transmitted to pinion gear P2/P3 then to pinion gear P1 (auxiliary gear). The crawl ratio is the number of rotations your engine makes before your tires make one full turn. Use this gear ratio calculator to select the best ring & pinion and gear ratio combinations to serve your needs. 55=14. 37 ring teeth divided by 10 pinion = 3. ” How to Calculate Gear Ratio. times and get it all back with the Chevelle Data and ID Guide 1964-1972 available at many online locations including my ChevelleCD. Solve for your Transfer Case Ratio. 76 ratio now. Chrysler and Ford speedometer gears are built into the outer shaft and can be used on any Chrysler or Ford transmission. All these changes can cause problems with accurate speedometer readings. Enter the tire size diameter and the target vehicle speed in MPH. Note: All 1965-67 Corvette rear axles were manufactured at Warren and are suffixed “W”. Vehicle Weight (in pounds) Vehicle Horsepower: RPM through lights (finish line) Tire Diameter (Hght. The higher the RGP ratio, the lower the top end speed but faster acceleration and more pulling power. 32" in length. Turbo 350  Gear Ratio Calculator. Check the theoretical vehicle speeds, RPM drops per gear and mile per hour pulls. exe) Description: Calculates how much your torque converter is slipping. 55's with my tire size to avoid a 3rd shift before 60. Graph RPM vs. From the factory, a Powerglide transmission has either a 1. 48 in a T400 or a 2. 70 ratio. Features on-line gear ratio and tire sizing calculators for the offroad and 4x4 enthusiast. 00 first gear, you would want about a 3. Click on Calculate Effective Ratio = (Old tire height / New tire height) * Original ratio Sun Teeth. A Horsepower Calculator from Quarter Mile Performance when finished. It will also show, for each gear, your total gearing in Revolutions Per Foot (RPF). This calculation is used to match oversize tires with new ring and pinion gears to obtain the desired engine RPM at highway speed. The ratio at which the input shaft turns compared to the output shaft can be determined as follows: Leading provider of high performance automatic transmissions, torque converters and drivetrain components for race, street/strip, hot rod, street rod and towing This web site was created for RACE-TRACK. 5:1 range and cruise at a bit higher rpm that the torque converter stall speed in 1:1 gearing, if you have a over drive gear having a lock-up converter sure helps and a What Gear Ratio is My Rearend? You can find your gear ratio easily with this method. One of the easiest approach you can take is to learn how to solve planetary gear configurations using similar triangles of levers aka lever diagram analogy. It would likely use a 3200-3500 stall converter, like PN109-603, to get the best performance. Most modern drag race cars use an automatic transmission. Click here for more information! Everything from performance torque converters for drag racers, mud racers and street enthusiasts to racing transmission pumps, powerglide gear sets and deep transmission pans, you can count on FTI for all your transmission needs. See ratios below and updated link to the 2nd gear calculator with the auto ratios plugged in. This transmission was very popular and considered one of the best of ever produced. 84" - GM #3708144 (27 tooth spline) or GM #3978758 (32 tooth spline) Small 6 tooth drive gear - 1. 68 overdrive ratio—would make this the perfect for performance and cruising. Extreme gear sets feature Sonnax premium sun and pinion gears that also undergo the same advanced processing used in Formula 1 ™, NASCAR ® and other high-end professional racing circuits. speed. etc. On average each gear ratio is roughly 250rpm, so I personally would leave the tire height, and go to the gear. For example, given 65 mph, a tire diameter of 30 inches, and a final gear ratio of 4. I also looked at it that down the road I will go bigger motor and run in the higher RPM range and did not want to do another gear change. Comes in 20, 21, 22, 24 and 25 tooth. Input - Note: Currently set for my personal trans (TH350) and rear tire combination. 82. 51, 6. Gear image generation code from http://jsbin. 31 Thanks for the help _____ Converter Slip % Calculator (1) Program (. 31:1 rear end gear ratio. 12 by your Jeeps tire diameter (Example: . Effective & Equivalent Gear Ratio Calculator New Tire Height: Old Tire Height: Original Ratio Effective Ratio: Equivalent Ratio Enter the New tire height, Old tire height, and the original rear gear ratio. Click "Calculate Differential Gear Ratio". 56. If you were to follow the contact point, it would describe a straight line that starts near one gear and ends up near the other They are roomy, with tastefully restrained, period use tail fins and chrome. 69 Powerglide straight cut gear set (short) BTE's powerglide 1. Below is how it is computed for a Lenco bug gears are gears GEAR SETS WITH COMPOUND STYLE PLANET GEARS ARE FACTORED THIS WAY. Drive Gear Teeth - The Number of teeth for the transmission; Rear End - Rear Gear Ratio (3. How you can see in the following image: A Powerglide transmission in combination with a low rear gear is a good choice for quarter-mile cars or performance engines that live in the upper rpm limits. A new speedo gear set for Chevrolet Turbo 350 Transmission. org. Year 1964 up Exploded View # 46A‚ 47‚ 49A‚ 50ASelect OEM planetary gear set. Check out this guide, which makes picking high and low ranges easier, on off-roadweb your obviously going to need to consider tire diameter, rear gear ratio and transmission gearing, generally your want the first gear in the transmission multiplied times the rear differential gear ratio to fall in the 10:1-10. So, to determine the ratio of 1st gear, you’d multiply the ratios of each individual case section. 80's in the 1/8th mile which translates to a 10. blk), 1. 1. 865″ diameter head. Battle Royale: The Turbo 400 And The Powerglide. Carrier Speed. 80, The 1. GM/CHEVROLET FINAL DRIVE RATIOS It is the gear under your seat that counts. my choice was between gearing the rear higher or switching to a powerglide. To help determine the driven gear needed for either drive gear based on rear gear ratio and tire diameter, try here. Chevrolet POWERGLIDE Transmissions Torque Converters. This Site Might Help You. right now, i couldnt ask for a better combo on the motor but when i spray it, im all in the shift light(7000) rpm before i have time to shift. I want to put in in an open wheel modified racecar. 52 second gear (think thats correct ratios)We turn around 4700-5200 rpms in first gear. Not having great luck finding diff code numbers but will have to get more serious. Different-ratio first-gear sets are now available (through TCI Automotive, JW Performance Transmissions, and others) for the Powerglide transmission. com Calculate the theoretical speed for a car in each of its gear ratios. ) in Inches In this tech article GM HIGH-TECH PERFORMANCE follows along as Century Transmission builds a two-speed GM Powerglide trans for our 1995 Chevy Camaro drag car - GM High-Tech Performance Magazine RPM Calculator. Also calculated is the new gearing you would need in order to return back to your original gear ratio when going to a bigger or smaller tire. The gear ratio codes are located on the front passenger side of the differential as shown in the illustration below. 283, 327, mild 350 CI motors and lightweight combinations usually fair very well with these ratios. 08, 3. 82 first in 6 cylinder cars. Seems that take-offs would be s-l-u-g-g-i-s-h, and the extra effort to get a heavy pickup moving with such tall gears would put strain on the transmission's clutches. A good way to calculate this is to multiply . Whether you are looking for performance parts for your 4×4, tractor, car or boat, we have it all. This is the lowest gear ratio attainable with an epicyclic gear train. This is a much lower ratio than what was common, and provides good acceleration from a stop and is also good for off-road driving. for instance a 3. Thanks in advance Doug Large 8 tooth drive gear - 1. Please start with the tutorial for shaft calculation to see how to introduce geometry and supports for single shafts. The 700-R4's 3. Comment all 8. Listed 1967 “AQ” and “AR” codes & ratios may only have been used early in the 1967 model-year, or not at all. Chevrolet Transmission Dimensions Dimension "C" is the distance from the bellhousing to the center of the transmission mounting pad. FTI Offers a wide variety and ratio of Drag Racing and Mud Racing Powerglide Transmission gear sets for standard length powerglides and shorty glides. 69 straight cut gear sets are constructed from the finest aerospace materials to ensure the most reliable backbone for your racing transmission. Whip out your calculator and follow along. It has a stock 1. Does anyone have a gear ratio calculator handy? I need to do some rev vs speed calculations. Does any body have a chart that shows what color/tooth count coincides with what. These can be ordered in stall speeds of 1200 to 5000. Includes rear reaction carrier‚ sun gear‚ rear output carrier and ring gear. When you pull gear out, you add slip to the converter because the engine is under more of a load to pull the gear, so it will slip more. Instructions. net website for personalized autographed copy. com by WayneClayton. Shaft is little over 14-5/8” long and 27 spline . Not only will an Overdrive Transmission improve your performance, but it will reduce your fuel consumption by up to 33%. 25, 6. The 3. 125” in length. Decoding Chevrolet VIN, trim tags, cowl tags, engine, engine block casting numbers, cylinder head casting numbers, intake manifold casting numbers, transmission, interior codes, and paint codes. 58 with a 14 tooth pinion and a 24 tooth driven gear. The trick with setting drag ratios is you want a really tall (lower number) gear ratio for the first gear and the a slightly less tall gear for the second. Transmission Gear Ratio Chart ~ Gear Ratios are listed for many popular transmissions Gear ratio calculator for your Chevrolet. When you upshift the first case Powerglide Ratio 1. RPM drop=current RPM*new gear ratio/old gear ratio roughly. 36:1, since it was an original powerglide car but wonder if it could be something else. I can't speak to Firebirds, but 3. A web based calculator to help you pick the right size tires, wheels, rear end, gear ratio and transmission for your 55-57 Chevrolet Gear ratio calculator for your Chevrolet This will help you pick the right size tires, transmission and gear ratio combination for your classic. If you would like to find a value other than speed, fill in information for all the boxes and clear the value in box you would like an answer for. The numbers used as a default for the second set are a 'what-if' I change ONLY the transmission to a 700R4. Whether you are looking for the evenly geared 2004R or the aggressive first gear (3. New transmission speedo gear for your classic. 55, 3. Largest Main Shaft in the Industry. You can swap any gearset onto any carrier and then into any housing. 80, 5. If your tires are bigger than stock you probably, like myself, have spend a lot of time trying to WAG (wild ass guess) your actual MPH when going down the road. Gear Ratio Speed Calculator By AssassinRacing. 73 rear ratio X 2. since my tranny now is a stock t350, its surviving on An entry level bracket race Powerglide would typically reuse the OEM gear set carrier that’s manufactured from stamped steel due to cost. 80, 1. I personally feel that the gear splits in a TH-700R4 are great for street driven cars as long as you don't get too crazy with the rear end gearing! 6th gear RPM is: Chevelle Restoration and Authenticity Guide 1970-1972 is available at many online locations including my ChevelleCD. 82). *** $3. 80 in my TD blown 526 hemi at 2100 lbs. Speedo Gear Selection. i would have to shift about 30 ft out to keep from over reving the motor. Choose from many gear options with a variety of tooth counts. While the original two-speed Powerglide continued unchanged, Turboglide provided a continuously variable gear-ratio which made "shifting" imperceptible. Was wondering if you (The driven gears also fit Aluminum Powerglide, Super T-10 and Chevy T5 transmissions. 26 Feb 2018 Rear-axle ratio: The ratio of the ring-and-pinion in the rearend (in your driven gears and sleeves interchange with most Powerglides and  Use this gear ratio calculator to select the best ring & pinion and gear ratio combinations to serve your needs. com FREE DELIVERY possible on eligible purchases Chevelle Data and ID Guide 1964-1972 is available at many online locations including my ChevelleCD. so what rear gear would be the best for the 1/4 mile to run 10's without hurting the motor with the 56's currently being used What do you guys like to do? rmcomprandy on May 19th 2014, 11:01 pm The main purpose is to take full advantage of the extra wheel horsepower the gearing would give you on the gear changes but, if the starting line reaction gets uncontrollable then it certainly won't help. 02, 6. 90 or lower if it helps). 06:1) in the 700R4, you are in the right place. A relatively narrow-tired car (each rear tire measures 11 inches or less across the tread) has a certain maximum starting-line ratio to be used based upon the weight of the car and the stroke of the engine. 00=11. Rear End Ratio @ Desired MPH: Tire Diameter (Height) in Inches: Over Drive Ratio (1 for no OD) Estimated Rear End Ratio Choosing the Correct Gear Ratio We should always consider the highest and lowest rpm in our powerband when choosing the gear for our cars. You can try various combinations to come up with an appropriate combination of ring and pinion gear ratio and tire diameter for your vehicle. 83, 6. Please contact us if you need help calculating the proper gear set for your TH350. Drag Performance Calculator By AssassinRacing. Early Powerglide / 3 speed standard Speedometer Driven Gears. Weekend Auto Racer - Tech Board - Archives. 6th gear RPM is: Chevelle Restoration and Authenticity Guide available at many online locations including my ChevelleCD. Sun Speed. Instructions: Use this calculator to estimate various aspects of your performance. To find out what the final gear ratio is, you must multiply the trans ratio by the rearend ratio. Many of you have changed tire size or axle ratio on your car and now the speedo reads too high or low. Gearing is what you are buying when you purchase a Gear Vendors Under/Overdrive. Let us know what you think! Please use our Contact Us page for issues that require a more immediate response. Also with muscle cars that have very large power bands. The ratio is calculated by multiplying your transmission, transfer case, and ring and pinion gear ratios. The value will be returned in estimated differential gear ratio, based on the entered values. I was thinking about changing to a lower ratio (1. More than 25 years of experience. I was thinking more of 700 to 1000 I'm changing the gear ratio from 3:08's to 3:73's and would like to change the speedo gear to reflect the correct mph. Sonnax is an industry leader in the cutting edge design, manufacture and distribution of the highest quality products to the automotive aftermarket, commercial vehicle industries, and industrial sectors utilizing drivetrain technology. A Powerglide transmission in combination with a numerically high gear ratio is a good choice for quarter-mile cars or performance engines that live in the upper rpm limits, and also for street-worthy muscle cars that have very broad power bands. Required fields are marked *. Share. Find TCI Powerglide Replacement Gears 747500 and get Free Shipping on Orders Over $99 at Summit Racing! These TCI Powerglide replacement gears are 1. 0 or 3. 5:1 compression, a Comp 292 cam (rough idling hot rod style cam), 4. For example, if the sun gear has 20 teeth and the ring gear has 60, the planetary gear has 80 teeth. 00: Core Charge: Does NOT Include refundable core charge of $100. The adapter kit includes an adapter housing, new Dana 300 input shaft, crossmember mount kit, faste 3. 42, 5. The following speedometer drive gears and driven gears are available for the For example, if the sun gear has 20 teeth and the ring gear has 60, the planetary gear has 80 teeth. 56 gears and running 28" tall tires . The second calculator allows you to actually input any EXACT transmission final gear ratio. Ring Teeth. 56  Gear ratio calculator for your Chevrolet. With 4. The turbo 400 originally had yellow/41 tooth gear. Download Catalog Gear changes, transmission swaps and tire sizes. Why Is a Transmission Necessary? • Provide torque multiplication at low speeds • Reduce engine RPM at highway speeds • Allow the engine to operate within its most efficient RPM range • Allows the engine to be disengaged from the rear wheels while the vehicle is not moving (torque converter & clutch) The following chart shows just how different the ratios are. 24, 4. Test out the Final Drive Ratio Calculator below. All you need is a jack, some jackstands, and knowing how to count helps too. We seem to be out geared last year on the 1/4 mile track. 06:1 gear ratio in 1st gear. Factory match for 4. This chart has been revised with actual ratios Powerglide Planetary Gear Sets by FTI Performance. i need my car to pull stronger on the bottle. Choosing between the mighty Powerglide and a Turbo 400 is largely a matter of horsepower, weight, and tire type. It’s running a 383 engine with 10. Gear Ratio and RPM Calculator Final Drive Ratio: Gear Ratio: Torque Converter Slip (%), %. 10 rear gear. Shifting out of first at a relatively low speed is part of just about any manual transmission. 26 x 1. TH350 -- 35hp 700r4 -- 70hp 727 -- 40hp 904 -- 35hp E4OD -- 65hp If you have corrections, or gear ratios for other rear-wheel drive transmissions, please e-mail me with the info. net website for your personalized, autographed copy. If you install the Turbo Hydro trans, you could easilly switch to a 3. In this example, 1st gear ratio would be 2. While this can be corrected with an aftermarket ratio adapter, SCS Gearbox, Inc. 52 first gear = 6. Many of these torque converters have over size Red or High Carbon clutch lining and billet covers. ) Tire Height - In Inches, Use The Gear Calculator or Tire Size Calculator Speedo Revs/Mile - Number of RPM the speedometer needs to turn at 60mph You can hit the SAMPLE button to see how some typical calculations will look. Welcome to rushgears. Trail reports in Colorado, classified ads, club listings, and more Super Max 3 Speed Gear Ratios. 20, 1. Advance Adapter The Powerglide to Jeep Dana 300 transfer case adapter is 3. Gear Ratio Speed Calculator By David Nguyen Calculate theoretical speed for a car in each of its gear ratios. DIVIDE LARGE PLANET GEAR TOOTH COUNT INTO SUN GEAR. For more than a Quality & Customer Service Distributor Support Warranty Info About Yukon Calculators Product Sheets Y. 8 LSD rebuild kit relatively cheap. 23 Mount Erin Rd, Blair Athol NSW 2560, Australia 02 9607 2299 Planetary gear ratio calculations This article also available in Spanish. Horsepower requirements for some transmissions. What is a good # for rpm drop on the gear change? Mine seems too much,, 1500-1600 rpm drop and that kills my boost. 27 = 10. 91:1 (1. Emergency Service Sonnax Powerglide Transmission Parts Catalog, Vol. This calculator is a useful tool that will do the math to help you figure out the gears that are needed to make your speedometer work correctly. S. Transmission yoke / Powerglide / 27 spline / 1350 series / Strange chrome moly Hughes offers 4 versions of this kit, one with 1. 76:1 or 1. Total length is 17. How: A number of factors must be considered when selecting a rearend gear ratio (ring & pinion set). You're going to have to put the car in nuetral or out of gear, so safety first! Do this on level ground, and be sure and chock the front wheels so the car can't move. RE: How do I find out the gear ratio for a powerglide transmission? I think it came off a 60's era chevelle. If a car has less than 6 speeds, only enter numbers for the ratios that apply (i. powerglide gear ratio calculator

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