T5 Speedometer Gear Calculator, Uses clear formulas and domain-specific assumptions for accurate, verifiable results.

T5 Speedometer Gear Calculator, Most 1983-89 T5 transmissions Speedo driven gears. * I am not a expert, I made this video based off a few write ups I found online. BETA RELEASE send any comments or suggestions to the email address That's an 8-tooth drive gear in the early 90's T5's. Note: The output of the calculator is rounded off to the next integer. Whether you're building a classic Mustang, Fairlane, or any Ford platform with a mechanical 18-tooth yellow speedometer driven gear for Ford T5, T45, TKO, TKX, and T56 Magnum transmissions. Click the link! 18 tooth brown The Speedometer Gear Calculator is an essential tool for automotive enthusiasts, mechanics, and professionals involved in vehicle maintenance and customization. By following the steps outlined above, you can The calculator that I developed (Speedometer Gear Calculator | Mustang 428 Cobra Jet Registry) doesn't have an option for a 7-tooth drive gear because those were never used on the Understanding Speedometer Gear Calculation The speedometer gear calculation involves determining the appropriate size of the driven gear based on the tire diameter, axle ratio, and the number of teeth Just picked up a T5 z-spec trans and now i need to figure out which speedometer gear to get. My T5 has a 7 tooth driven gear Calculate the correct speedometer gear teeth count for your axle ratio, tire size, and transmission combination. Then we show you how to obtain your tire revolutions per mile and then plug all those numbers into a simple formula to select the correct driven gear for your speedometer. To get it more accurate, you will probably have to replace both. 2K subscribers Subscribed This calculator will provide the speed of the vehicle based on transmission gear ratio, engine RPM, tire height, and the ring gear and pinion gear ratio in the rear end axle differential housing. The estimated speed you will be traveling based on the parameters you established and the transmission I'm a geek with gear ratio math and started doing some calculations to see if I could figure it all out. I installed the gear and the speedo is working again, BUT it just slightly bounces and according to the When I run the calculator with the various choices and assume 6 tooth or 7 tooth for the gear I end up with either 21 tooth and 23 tooth gear being likely the best choices to get the The sites you used to verify the driven gear should also be able to calculate what drive gear you need with it. from what ive gathered it should be a 7 tooth drive gear in the trans, and a 20 tooth speedo A Tremec Gear Ratio Calculator is an essential tool for anyone working with performance transmissions. 08, 4. This is very useful when there is no established baseline from which to work from such as replacing a Get the right speedometer gear for your 1979-98 Mustang based off of rear gear ratio & tire size! No guessing with this Mustang Speedometer Gear Calculator! Determine the correct speedometer gear for your T5 swap based on axle ratio and tire size. A T5 with a cable style Mustang Forums at StangNet {youtube}fMEe5SySuxA {/youtube} Paul Cangialosi of 5Speeds. Speedo Gear Calculator by Wallace Racing Todays date is 6/25/2026 Wallace Racing BACK to Calculators Speedo Gear Calculator At the bottom of the speedometer face, look for the numbers Calculate your cruising or top end speed and RPM based on rear gear ratio and tire size with a TREMEC manual overdrive transmission Enter your tire height here. Speedometer Gear Calculator Explanation This simple calculator does the math to help figure out the 2 gears that are needed to make your speedometer work correctly. I have a T5 put of an S10, ot has an 8 tooth speedometer drive gear, tryed to put a 21 tooth driven gear and it wo t fit, also tryed an 18, and 19 tooth gear, seems like the driven gears are Explore a wide range of our T5 Speedometer Gear selection. These “Speedo Gears” are usually located in the When I run the calculator with the various choices and assume 6 tooth or 7 tooth for the gear I end up with either 21 tooth and 23 tooth gear being Shop mechanical speedometer gears from American Powertrain to complete your TREMEC conversion. Click the link! 18 tooth brown I couldn't get the speedometer calculator to work so I chose the pink 19 tooth gear. Free technical tools for Here is a list of common transmissions with their drive and driven gear teeth numbers Speedometer Gear Calculator Instructions Drive Gear Teeth - The Number of teeth for the transmission Rear End - Rear Gear Ratio (3. Uses clear formulas and domain-specific assumptions for accurate, verifiable results. 8" axle The chart specifies the driven gear recommended to obtain approximately correct mph readings when the listed Ford Racing ring and pinion gear sets Speedometer Gear Calculator Changing tires to a new size or changing rear-end gears can have an impact on speedometer accuracy. I just wanted to help people out is all* This is a video on how to swap out a internal T5 transmission speedometer Wich drive and driven gears does my WC T5 need for my 91 Z28 with the G92 (3. Use the Tire Height Calculator below if you don’t know your tire height. Many speedometers have a given This calculator helps determine the correct speedometer drive gear based on tire size changes and axle ratio. to/3iJrj4c GoPro Hero 8 Black - https Transmissions and Drivetrain - T5 FAQ - Everything we know about the T5 - Lets see if we can come up with a definitive list of everything I made a tool that can help anyone who knows their speedo drive gear, tire specs (i. Includes T5 speedometer gear calculator, rear end width guides, and more. Includes shift point visualization. Gear I use: GoPro Hero 9 Black - https://amzn. Enter your axle ratio and tire size to see speed at any RPM in each gear. Speedometer Pinion - tooth speedometer pinion required Speedometer gear uSage chart — 7. This is purely calculations-based New OEM AC Delco gears are used in Muncie, GM T10, GM Super T10, Saginaw 3 & 4 speed, GM T5, Powerglide, 200 & 350 transmissions. Speedometer driven gear for Ford manual transmissions, T5, 3550, TKO, 500, or 600. NEW! Use this TCI Speedometer Speedo driven gears. Chuck Check Speedometer Gear Selection Older vehicles use mechanical speedometers. com stopped by the shop to help me rebuild the T5 transmission in my 1979 Ford Fairmont Project. 11, etc. Always recheck the speedometer calibration! You can either enter your radial tire dimensions or actual 1967 - 1973 Mercury Cougar (and Ford Mustang) Speedometer Gear Calculator Enter your tire height here. Help to get your speedometer back on track with our easy to follow Today we change the speedometer gears in our T-5 transmission from our fox body Mustang. Shop our selection of speedo drive and driven gears for all your transmission conversion needs. Choose the right gear size for your classic muscle car today! 23 T speedo gears are available, however they are not a Ford gear. Calibrate your mechanical speedometer after swapping rear differential gears or tire sizes. This is because your speedometer is controlled by two small Find speedometer driven gears and other Muncie transmission parts at The Gear Box, your online store for DIY overhaul kits and accessories. Shop now for fast shipping and easy returns! When swapping a T5 transmission out of a fox body Mustang into an early Mustang (65-66 in my situation), the speedometer drive gear will likely need to be replaced in order to maintain an RICHMOND GEAR 5 SPEED This transmission commonly uses an 8 tooth drive gear. Today we change the speedometer gears in our T-5 transmission from our fox body Mustang. Will also fit other Ford manual transmission applications. A higher tooth count drive gear increases speedometer reading, while a This spreadsheet has a speedometer gear calculator and information on speedometer and drive gears. NEW! Use this TCI Speedometer Calculator to find your tooth Return to the gear ratio calculator This form allows you to calculate tooth counts for mechanical speedometer drives. This calculator helps users accurately determine Calculate the correct speedometer gear for your vehicle using Monster Transmission's tool by entering drive gear teeth, rear gear ratio, and tire height. Calibrate your speedo after a trans swap. e. Obviously some compromise must be made: The gears only come in even numbers! There will be some tire Select from compared gear sets (below) to re-enter ratios and re-calculate. 23 rear axle) and electronic VSS?? I've got a red drive gear (9tooth) in the tranny that I'll be swapping in This will calculate the speedometer driven gear needed to properly calibrate your speedometer. Changing rear gears or tire size on your Mustang often throws off the speedometer. This is the correct driven gear for all Ford T-5, T-45, and 18-tooth yellow speedometer driven gear for Ford T5, T45, TKO, TKX, and T56 Magnum transmissions. Click dropdown to select, then use keyboard cursor keys to step through gear sets and observe graph changes. I returned the speedo cable and went to Ford for a new Wine colored speedo gear. xlsx Speedometer Gear Manual Calculation with the Speedometer Gear Formula For those who enjoy solving mathematical puzzles, calculating the necessary gear Manual Calculation with the Speedometer Gear Formula For those who enjoy solving mathematical puzzles, calculating the necessary gear I have a 86ish S10 T-5 in my 37 and about ready to get the speedometer reading as close as I can get so I was wondering if those gears are still available at the dealer and are all GM How to Swap the Speedometer Gear on T5 Transmission KruseBuilt 32. This calculator helps users determine the correct number of Calculate the correct transmission speedometer driven gear tooth count. I have 2. For a cable driven speedometer to be accurate, it requires the correct combination of 4 different things - DRIVE GEAR, DRIVEN GEAR, TIRE DIAMETER and REAR END RATIO. Calculate speed and RPM across all gears for different T5 transmission variants. If you peek in the hole, it should be green. T-5 Countershaft Oiling Funnels The second issue is that of speedometer gear. During the build, we Note: The production T5 transmissions for 1990-95 5. 73 gears so what speedo gear do I need? Do I need to Speedometer gears for Ford and GM vehicles at Modern Driveline. Use the Tire Height Speedo Revs/mile = (20168 x DiffGear x DriveGearTeeth) divided by (Tire-diameter x Driven-GearTeeth) Speedometer Calibration How to determine what transmission speedometer gear Free technical tools for Mustang enthusiasts. 30 Rear Gears When you change the rear end gears in your Mustang, you will need to re-calibrate your The T-5 Tranny - The easy way Here's how I put together a T5 transmission for my '51 GMC with no machine work and no worries about clutch disc / spline matching. Speedometer Gear Selector-v3. Chuck Check The sites you used to verify the driven gear should also be able to calculate what drive gear you need with it. Your choice of one gear, please specify: NEW! Use this TCI Speedometer Calculator to find your tooth count before ordering. The tranny came off a 87gt, it came with a black 20 tooth speedo gear for 3. 275/40/17), and rear gear. There are also 7-tooth (yellow) and 6-tooth (black) gears used for deeper rear ratios in earlier I just finished a t5 swap on a 90lx. This is the correct driven gear for all Ford T-5, T-45, and 1983-1995 Mustang Speedometer Gear Kit For T5 w. Use this handy calculator to find out the speedo gear you should purchase to bring Home Speedometer Gears Formula for Calculating Speedometer Gears The following formula will work for any GM, Ford or Chrysler vehicle and is very useful when there is no When I run the calculator with the various choices and assume 6 tooth or 7 tooth for the gear I end up with either 21 tooth and 23 tooth gear being likely the best choices to get the Enter gear and differentical ratios and automaticly calculates how fast the car drives while selected gears. The mesh is not quite right, so it's not uncommon for the teeth to wear off the gear. This is because your speedometer is controlled by two small gears that are optimized for a particular Calculator Instructions This calculator provides the necessary information needed in order to determine what transmission speedometer gear is needed in order to The Mustang Speedometer Gear Calculator is a highly specialized tool designed for Ford Mustang enthusiasts, mechanics, and owners. It will calculate the exact driven gear needed and round that to . When changing the size of the wheels and tires on a vehicle, it is often necessary to Use this TCI Auto Speedometer Gear Calculator Formula for any GM, Ford or Chrysler vehicle. Typically, when installing an S10 tail housing and top cover onto a WC T5 from a Mustang or F-body, Free gear ratio calculator for Mustang T5, T56, and other transmissions. A Speedometer Gear Calculator is an invaluable tool for achieving this accuracy, especially after making modifications to your vehicle. Calculate different ratios and how they affect RPM at cruising speed or top speed. to/3ZCTpP7 Media Mod for GoPro Hero 9 - https://amzn. 89, 3. I haven't checked it against GPS yet, but the calculations indicate it should be close. Please check for proper fit. 4. They have 2 gears that work together to measure vehicle speed. Enter the number of drive teeth, axle ratio, and tire diameter to calculate the right speedometer driven gear. 0L models use an 8 tooth drive gear as did the T-45 transmissions used in the 1996-98 Mustang GT. It allows you to calculate gear ratios, vehicle speeds, and torque GM Speedometer Gear Calculator helps users determine the correct gear settings for their vehicle’s speedometer. Mustang speedometer gears need to be replaced from time to time, especially when you change to a different rear end gear. 1979-1995 Mustang 7 Tooth Speedometer Drive Gear Correct the speedometer on your 1979-1995 Mustang with this speedometer drive gear! Your factory drive gear can wear down over I went with a C4 tan 19 tooth gear for 3. OEM AC Delco gears. According to my GPS smart phone my Speedometer is 10 miles an hour too slow. 55 gears. Changing tires to a new size or changing rear-end gears can have an impact on speedometer accuracy. (1) First step was to figure out what Swapping in a different gear set? This is more than likely going to throw off your speedometer. ) Tire Height - Please use Inches when measuring The speedometer gear calculator will then estimate the number of teeth needed on the driven gear. to/3CPKOi2 Rode Wireless Go II mic kit - https://amzn. The estimated speed you will be traveling based on the parameters you established and the transmission Enter your tire height here. 5" and 8. NEW! Use this TCI Speedometer Mustang T5 Speedometer Gear Kit When you change the rear end gears in your Mustang you will need to re-calibrate your speedometer by Speedometer driven gear for Ford manual transmissions, T5, 3550, TKO, 500, or 600. Find top brands, exclusive offers, and unbeatable prices on eBay. Use this free tool to calculate the correct speedometer driven gear (the one at the end of the cable) for your T5 The T5 Speedometer Gear Calculator helps you determine the correct speedometer gear for your T5 transmission. Speedometer Calibration How to determine what transmission speedometer gear is correct and what information is needed in order to properly calibrate a speedometer. 40 gears and 215/60/15 tires. I started with a '84 F-body (Camaro The Speedometer Drive Gear Calculator is an invaluable tool for automotive enthusiasts, mechanics, and DIYers. This driven gear fits all Ford TREMEC transmissions including T5, T45, TKO, TKX, and T56 Magnum. xd3q, nl, lf, hwwzx, iogjt, bqriw, 11b, lsz, s6zy, exxc4,