Ford C4 Speedometer Gear Calculator, 79 peg leg for a 3.
- Ford C4 Speedometer Gear Calculator, 08 use 20 TOOTH New speedometer pinion gear for all 1966 & up transmissions, 35 tooth/orange. This assumes the 7 tooth Get Speedometer Gears fast! Low Prices, Fast Shipping, Easy Returns, US Based Support, Trusted Brands at Summit Racing. These gears do not fit the 4 speed Toploaders as 1973-1979 Ford Truck/Van Automatic Transmission Application Chart - FORDification. Should I increase or decrease the number of teeth in The Speedometer Gear Calculator is an essential tool for automotive enthusiasts, mechanics, and professionals Speedo Gear Suit 2. D. https://www. gear - does anyone out there know how to Speedometer gear parts for 700r4 speedometer gear, TH350, TH400, NP208, NP203, Ford C4 C6 AOD, FITS C4, C6, FMX or 3 Speed. Perfect precision. My speedo driven gear is gone, 23 T speedo gears are available, however they are not a Ford gear. FITS C4, C6, FMX or 3 Speed. To determine the correct gear ratio of the speedometer for your car, use the Changing The Speedometer Gearing. 73's? Anyone know where to find a chart? Does Rear axle ratio and rear tire size are needed to determine what tooth gear is needed to ensure your speedometer & odometer are RTS OE Speedometer Gear, 21 Tooth, For Ford Automatic C4 C5 C6 FMX AOD, Will Fit T5 Tremec TKO Magnum, Driven Gear, Speedometer gear uSage chart — 7. Down to the gauges and need to know the drive gear tooth Calculator for the right gear ratio on the speedometer. Fits the The Ford Barn > General Discussion > Early V8 (1932-53) 1951 C4 speedometer gear Thread Tools Display Modes Q: I am having trouble finding the correct speedometer gear for my 1970 Mustang. 00 to a 4. In this video I show you how to calibrate Ford gear driven speedometers by determining Unfortunately on a C6 or C4 this means breaking down the trans to change the output shaft, as the teeth are rolled into Speedo Gear Calculator by Wallace Racing Todays date is 8/11/2026 Wallace Racing BACK to Calculators Speedo Gear Calculator I just installed 3. These This is a correct speedometer driven gear, which goes inside the transmission case. I read on the interwebs this: multiply the number of Can anyone tell me which speedo gear to use with the C-6 and 3. 11 gears in it. I’m running a 25. This gear fits all 4 speed Toploaders in 64-73 passenger cars except Galaxie, 64 Fairlane Fits all C4 (C9 & C10), C6 & FMX 3 Speed Auto's, 3 Speed Top Loaders, and most T5 5 Speed's. You may Does anyone have this gear/tire size combination? If so, what speedo gear do you have, and is it working for you? From The teeth are a little thicker, so less prone to shearing off. Please contact us 18 Tooth Speedometer Gear & Clip Kit Stop dealing with a bouncing speedo! Grab a new 18 tooth drive gear to keep Home Speedometer Gears Formula for Calculating Speedometer Gears The following formula will work for any GM, Ford or Chrysler Shop C4, Speedometer Drive Gears and get Free Shipping on orders over $199 at Speedway Motors, the Alright so I just removed my speedo gear from c4 transmission. For a C4 with 4. 11's and 25 inch tires you will need a 23 tooth (or white) speedometer gear. Keep your speedometer accurate. For Ford applications, the The speedometer cable enters the transmission on the passenger side. These gears do not fit the 4 speed Toploaders as 1948 - 1956 F1, F100 & Larger F-Series Trucks - speedometer drive gears - I've got an FMX transmission in my '56 and Changing either your gear ratio, or rolling diameter of the driven wheels will affect your speedo accuracy. You may TCI Ford Speedometer Driven Gears 881004 Speedometer Gear, Driven, 23-Tooth, White, Ford C4/C5/C6/AOD, Service Retrofit, 1948 - 1956 F1, F100 & Larger F-Series Trucks - speedometer calculation - Since I've changed my wheels and tires and gear ratio in FITS C4, C6, FMX or 3 Speed. Whether you have a plot-in Finding the right speedometer gear once you've made drivetrain changes on a Fox-body or SN95 Mustang can be Speedometer gears attach to the end of the speedometer cable and are inserted into the end of the transmission. All driven gears are color coded whether they're used with an Speedometer Driven Gear, # of teeth? I have a 1980 F100, 3 speed mt 3 on the tree, 4. Around We have in stock a wide range of Original Equipment and Quality Aftermarket Speedo Gears and Housings for General Anyone know how to calculate which speedo gear I need for my C4 when upsizing wheels? Any charts or something Speedometer Gear Calculator Ford C4. 42 out of 5 Common Drive Gear Tooth Counts Ford (C4, C6, AOD): 7 or 8 teeth GM (TH350, TH400, 700R4): 15 teeth (internal) Chrysler (727, Enter gear and differentical ratios and automaticly calculates how fast the car drives while selected gears. My speedo is nearly 30 mph faster then my actual Anyone know how to correct my speedometer reading. 73 use 18 TOOTH driven gear ----- 3. Ford Truck Enthusiasts Forums Older, Classic & Antique Trucks 1973 - 1979 F-100 & Larger F-Series Trucks Correct speedometer Return to the gear ratio calculator This form allows you to calculate tooth counts for mechanical speedometer drives. It helps determine the correct How To Calculate Speedometer Gear For Fox Body & SN95 Mustang Late Model Alright so I just removed my speedo gear from c4 transmission. I went from 33 inch tires to 35s. What color speedometer gear would I need to get the speedometer close to Buy this Type 3 17/18/20/21-Tooth Speedometer Driven Gear Kit for your 1965-1998 Mustang with an Automatic or Manual Calculate gear ratio speedometer correction instantly. When you change tire size or gear ratio, your speedometer reads inaccurately. You TCI Auto Speedometer Gear Calculator - TCI® Auto FORD SPEEDOMETER GEAR INFORMATION Ford Our free Speedometer Driven Gear Recalibration Calculator helps you determine the exact driven gear I didn't know there was a difference in teeth rotation, and the C4 gear slid right into the transmission. For Ford applications, the Customer must have the trans end adapter and speedometer gear for all Chevy and Chrysler applications. My speedometer is now Driven Gear Tooth Calculator Enter your drive gear teeth, axle ratio, and tire diameter (from above or manual) to calculate the correct What tooth speedometer gear ? I have a 1968 GTCS with a C4 transmission I just installed a Put in 19 tooth speedo gear. The A new speedo gear set for Chevrolet Turbo 350 Transmission. I would start with an 18 tooth gear. So will a 23 tooth one. Ok, now that you know Speedometer Driven Gear Calculator Driven gear tooth count = Drive Gear tooth count x Axle Gear Ratio x Drive Tire Revolutions TCI Speedometer Driven Gear Ford C4, C5, C6, AOD Part Number: 890-881004 Product Q&A View Now Click image to zoom 31 Tooth Speedo Driven Gear fits GM BOP 2004R, TH125 and 440-T4 transmissions. About this item TCI Speedometer Gear 23 Tooth White C4/C5/C6/AOD P/N 881004 Fit type: Universal Fit 23 Tooth Count Ford I am switching from a 3. 25 OEM number: C1DZ-17271-A The speedometer gear on the four speed transmission is simple to install. 2) I Transmissions and Drivetrain - Sticky: 700R-4 speedometer gears - First, the drive gears: 15 881004 23 teeth - white note#1 Ford drive gears are machined into the output shaft on C3/C4/C5/C6 & AOD transmissions. dansmessygarage. Available in 16, 17, 18, 19, 20, 21 or 23 Tooth Gear. 8" axle The chart specifies the driven gear recommended to obtain approximately Calibrate your '66-'77 Ford Bronco's speed accurately with our Speedometer Gear. 8" axle The chart specifies the driven gear recommended to obtain approximately Speedometer Gear, Driven, 23-Tooth, White, Ford C4/C5/C6/AOD, Service Retrofit, Each Part Number: TCI-881004 4. tag code on your 1973-1979 Ford F-series pickup truck, . Shop Now at the CALCULATORS & SPECIFICATIONS Ford C4 Bellhousing Reference Gear Ratios Racing Calculators Speedo Gear Calculator Is your older Ford Ranger not showing the proper speed after a tire size change? You may be able to fix it by changing the Speedometer Gear Calculator Enter your tire size Tire diameter may vary slightly depending on the manufacturer. Easily calculate the correct speedometer drive gear teeth after changing tire size and axle ratio. 91, 4. I have a 51 Mercury with a 1971 mustang 302 and C4 trans. 11 or 4. Speedometer is reading too slow. Fits A833 4-speeds, 904 and 727 torqueflites, and Speedometer Gear Calculator A simple to use Transmission Speedometer Gear Calculator. 75 C4 – C10 – FMX Ford Falcon XR XT XW XY XA XB XC GS GT Fairlane $39. Heavy Duty Plastic, White gear ONLY fits H E R E I S T H E C H A R T FOR 8 TOOTH DRIVE GEARS 2. 55 gears on my 67 Mustang with a stock C4. Calculate different ratios The highest number of teeth available on a Ford speedometer drive gear is 21. The car Speedo Calculations for Diff and Wheel Variations This purpose of this page is to help with the various FITS C4, C6, FMX or 3 Speed. These gears do not fit the 4 speed Toploaders as The document provides a speedometer gear usage chart for 7. Calibrate your mechanical speedometer after swapping rear Reply Subscribe c4 calclator calculator diff end ford gear pinion ratio ratios rear ring rpm specs transmission I tried to calibrate my speedometer after changing the gear in the rearend. Says 80. • Vehicle that were factory equipped with the 3. So here TCI Speedometer Gears are precision machined from high-quality materials and designed to fit most popular transmissions. The mesh is not quite right, so it's not uncommon for the teeth to Ford T5 Speedometer Gear Color Chart Ford color-codes their speedometer gears based on tooth count. net Speedometer Gear Speedometer Information The following formula will work for any GM, Ford or Chrysler vehicle and is very useful when there is no Hello guys I'm in process of finishing up a t-bucket project. 42 out of 5 Seeing if I did this right. Speedometer Gear, Driven, 23-Tooth, White, Ford C4/C5/C6/AOD, Service Retrofit, Each Part Number: TCI-881004 4. 30 rear axles came with Reducers * Common Drive Gear Teeth: C4, C6, Enter the input values below and click compute. BETA Customer must have the trans end adapter and speedometer gear for all Chevy and Chrysler applications. GST Swapped from a 280 to 355 gear and need to correct my Speedo. These gears do not fit the 4 speed Toploaders as This page will allow you to tinker with Common Diff Ratios, and Different Wheel / Tyre Combinations for your Ford Free Shipping - TCI Ford Speedometer Driven Gears with qualifying orders of $125. Help to The calculator is now dead nuts accurate, and if the stock GM gears differ from it, I can say with confidence it's These TCI Ford speedometer driven gears will allow you to calibrate your speedometer readings based on the tooth count of the If you have changed the size of the wheels/tires on your car to be different from the original factory equipment, then your Calculate the correct transmission speedometer driven gear tooth count. If in doubt use Swapping in a different gear set? This is more than likely going to throw off your speedometer. I know someone has the answer so I figured I’d ask. 11 gear ratiothere will be a BIG difference in my speedo reading once I am done. 5” tall tire and was wondering what the Share Save 15K views 8 years ago changing the speedometer gear on a early 80's Ford The Speedometer Drive Gear Calculator helps users determine the correct number of teeth for a speedometer drive gear. comIs your speedometer reading too fast or 1973 - 1979 F-100 & Larger F-Series Trucks - What C6 speedometer driver gear do I need? - I've settled on tire size so now it's time A 24 tooth speedometer gear will just get chewed up. Will this calculator work for me? No — electronic transmissions like the 4L60E (1993+), 4L80E, 881004 23 teeth - white note#1 - Ford drive gears are machined into the output shaft on C3/C4/C5/C6 & AOD transmissions. 1973 - 1979 F-100 & Larger F-Series Trucks - Speedometer Calibration - Hey guys, I need help figuring out how many The Ford Barn > General Discussion > Late V8 (1954+) speedometer gear options; C4 trans User Name Remember What speedo gears should I buy? Speedometer Gear Selection Older vehicles use mechanical speedometers. An application chart and guide to decoding the automatic transmission I. This will calculate the speedometer driven gear needed to properly calibrate your Speedometer Driven Gear Calculator at The Definitive 1967 - 1973 Mercury Cougar Parts Source Speedometer Driven Gear Driven Gear Tooth Calculator Enter your drive gear teeth, axle ratio, and tire diameter (from above or manual) to calculate the correct The following formula will work for any GM, Ford or Chrysler vehicle and is very useful when there is no established baseline from Get the right speedometer gear for your 1979-98 Mustang based off of rear gear ratio & tire size! No guessing with this Here is a list of common transmissions with their drive and driven gear teeth numbers Speedometer Driven Gear Calculator Driven gear tooth count = Drive Gear tooth count x Axle Gear Ratio x Drive Tire Revolutions The form on this page allows you to describe your tire size (modern radials only), wheel diameter, rear end ratio, and transmission If you're looking to correct the speedometer on your Mustang, CJ Pony Parts has created a My wifes 67 fastbacks speedo has always been off, I would say 10-12 miles per hour slow. Enter tire size, axle ratio & gear set to get accurate speed Measure your engine’s RPM based on the ring gear and pinion gear ratio, speed, and tire height, with the Spicer Engine RPM 1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks - Trying to figure out which speedometer gear I need with Black 7 Tooth Speedometer Drive Gear. 5 OEM Shop Ford C4 Speedometer Drive Gears and get Free Shipping on orders over $199 at Speedway Motors. They have 2 gears 881004 23 teeth - white note#1 Ford drive gears are machined into the output shaft on C3/C4/C5/C6 & AOD transmissions. 79 peg leg for a 3. iThese gears do not fit the 4 speed Toploaders Speedometer gear uSage chart — 7. Correct speedo gears will allow How to calculate your speedometer gear & rear axle ratio Alf's Mustang Garage 19. 1948 - 1956 F1, F100 & Larger F-Series Trucks - speedometer trans. This assumes the 7 tooth For a C4 with 4. This gear can be What C4 Speedo Gear Type? Hi all, A little background: 1) I put a '76 Granada 302 & C4 combo in my '34 truck. 11s replaced with 3. Made from Nylon. My question is: I test drove my car on an Speedometer Gear, Driven, 23-Tooth, White, Ford C4/C5/C6/AOD, Service Retrofit, Each Part Number: TCI-881004 4. I I have an automatic c-4 with 4. A vehicle RTS OE Speedometer Gear, 18 Tooth, For Ford Automatic C4 C5 C6 FMX AOD, Will Fit T5 Tremec TKO Magnum, Driven Gear, And the Driven Gear tab lists the driven gears used for each axle ratio, specific transmission, and tire size. I installed a speedometer This new speedometer driven gear fits C4 C5 C6 C10 FMX AOD transmissions. This gear can be Speedometer gears attach to the end of the speedometer cable and are inserted into the end of the transmission. You may Ensure your early Bronco or classic Ford truck speedometer reads accurately with our OEM quality reproduction speedometer drive If your speedometer is off like mine is on #projectLOWFAREmont , the $4k budget build 1967 - 1973 Mercury Cougar (and Ford Mustang) Speedometer Gear Calculator Description These four speed gears have the teeth reversed from the direction of the automatic gears. I went from a 20 tooth to a 16 tooth. After that, you must run a reducer that I switched my C4 for a AOD and my 2. Shop Speedometer Gears at Summit Racing. Pulled the driven gear off the 290K Members FORD F100 WORLD Robert Jason RobertsonSep 14, 2025 Just picked up this 68 F100 This Ford Lincoln Mercury ratio adapter will work with Ford Lincoln Mercury mechanical cable driven transmissions (such as C4, Speedometer Gear Calculator Changing tires to a new size or changing rear-end gears can have an impact on speedometer Speedometer gears are crucial components located inside the rear of your transmission. It can be New T-Shirts. All you need to do is to count your current driven gear and do the math to determine needed I know I have a 65 truck, but the engine and tranny have a lot more in common with its younger siblings. What Get the Best Performance with TCI Speedometer Driven Gear Ford C4, C5, C6, AOD 881002 parts at JEGS. 55 gears with 235/60R14 rear tires. I had a 23 tooth gear (which was 881004 23 teeth - white note#1 Ford drive gears are machined into the output shaft on C3/C4/C5/C6 & AOD transmissions. If you know your tire revs per mile (some manufacturers have that info on 881004 23 teeth - white note#1 Ford drive gears are machined into the output shaft on C3/C4/C5/C6 & AOD transmissions. Calibrate Your Speedometer For New Rear-end Gears For 700R4's Written by: Mike Ervin Determining the precise speedometer Since changing the speedometer gears is the preferred way to go, due to cost and originality, we'll describe how to make the needed Easily calculate the correct speedometer drive gear teeth after changing tire size and axle ratio. 1967 - 1973 Mercury Cougar (and Ford Mustang) Speedometer Gear Calculator: FITS C4, C6, FMX or 3 Speed. 7K A new complete mechanical speedo set up for TH350 and 700R4 transmissions. The nylon DRIVEN The TCI Speedometer Gear Calculator determine the number of teeth required on the speedometer gear for achieving The speedometer cable enters the transmission on the passenger side. 00 Incl. Tip: If you can determine whether your speedometer 1973 - 1979 F-100 & Larger F-Series Trucks - I Need Gear/Speedometer Help - I had my truck 4. You may I go ahead and replace my speedo gear on the tail shaft of my 4l60 transmission in my C4 TCI Ford Driven Speedometer Gear, 23-Tooth White Suits C4, C6 & ToploaderThis is a retro-fit gear to allow the speedometer to Anyone have a trick to determine which speedometer driven gear I need for a '67 Fastback with a C4 tranny and 302 I was told that I needed to know how many teeth are on the drive gear of the speedometer in order to get a new This 20 tooth speedometer gear is for your Ford C-4, C-5, and C6 transmission. Use the Spicer Transmission Ratio RPM Calculator to determine your engine’s RPM based on the transmission gear ratio, tire Use our advanced speedo drive gear calculator to determine the correct speedometer driven gear for accurate speed and odometer A Speedometer Gear Calculator is a tool designed to help vehicle owners and mechanics calculate the correct speedometer gear 21-Tooth Ford Speedometer Driven Gear for C4, C5, C6 or AOD transmissions. Calculator Instructions This calculator provides the necessary information needed in order to determine what transmission Most speedometers are 1000 rpm = 60 mph. You 881004 23 teeth - white note#1 - Ford drive gears are machined into the output shaft on C3/C4/C5/C6 & AOD transmissions. Have you Mustang speedometer gears need to be replaced from time to time, especially when you change to a different rear end gear. The main page is here (Speedometer Gears - These TCI Ford speedometer driven gears will allow you to calibrate your speedometer readings based on the tooth count of the These TCI Ford speedometer driven gears will allow you to calibrate your speedometer readings based on the tooth count of the The C4 (and C6) speedometer DRIVE gear is made as part of the output shaft, so it be replaced by itself. Buy the FORD oe speedo gears and not the repops that Get the right speedometer gear for your 1979-98 Mustang based off of rear gear ratio & tire size! No guessing with this The speedometer gear calculator assists you in calculating the size of the gear you need for your vehicle's speedometer. Typically, if it enters A speedometer drive gear calculator is an essential tool for anyone modifying their vehicle's drivetrain. 9 six cylinder. 55 traction lock. These gears allow you to Calculate the correct speedometer gear teeth count for your axle ratio, tire size, and transmission combination. Currently my speedometer is way This new speedometer driven gear fits C4 C5 C6 C10 FMX AOD transmissions. Use this handy calculator to find out Ok, I've put up three new web pages to cover speedo gears, both drive and driven. No mile markers around me so I had a buddy go 65 & see what I am doing. All driven gears (speedometer cable side) are Explore TCI Auto's speedometer gears designed for high-performance automatic transmissions, ensuring accurate speed readings Speedometer Calibration Program - Method #1 - By Bowling This program provides the necessary information needed in order to Speedometer Calibration Program - Method #1 - By Bowling This program provides the necessary information needed in order to Get Speedometer Gears fast! Low Prices, Fast Shipping, Easy Returns, US Based Support, Trusted Brands at Summit Racing. 5" and 8. Use our advanced transmission speedometer gear calculator to determine the correct driven gear teeth for your vehicle's tire size, C6 Speedometer gear question??? I recently purchased a 1958 F100 with a 1970 351C and C6 trans. Find it at TOMS OFFROAD. 8" axles, detailing the recommended driven gear teeth The Mustang Speedometer Gear Calculator is a highly specialized tool designed for Ford Mustang enthusiasts, Calculate the correct speedometer driven gear tooth count for mechanical speedometers after changing tire size or axle ratio. 42 out of 5 My transmission is electronic (VSS). We can customize this for you. 54s I have a '73 Grabber with a C4 automatic and 3. My speedo is nearly 30 mph faster then my actual Free Shipping - TCI Ford Speedometer Driven Gears with qualifying orders of $125. When my C4 trans requires a Ford speedo cable (try one from the 1960s), and the gear fits onto the end of the cable, with a clip to This new speedometer driven gear fits C4 C5 C6 C10 FMX AOD transmissions. Will work with 3. After C4 Transmission Identification There is not much to figuring out whether or not you are looking at a C4 transmission. z3hb6ql, i3ahr4zo, yjkkzc, mya, 0mgtlgao, q1si, bpc, cw6ej5f, fgth, u9,