GM Speedometer Gears for Automatic and Standard Transmission

Speedometer Gears for GM / Chevy Automatic and Standard transmissions. Worlds Largest Selection of Rear Wheel Drive American Speedometer Gears.

Chevy / GM drive gear, driven gear. GM Speedometer Cables and Ratio Adapter.

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2WD - 700R4 Speedometer Gears (also fits non-Chevy TH350)

Speedometer Calibration
Variables such as the vehicle's axle ratio and tire diameter affect the accuracy of the speedometer. The following speedometer drive gears and driven gears are available for the 700R4 / 4L60 transmissions. Most cars and trucks with low rear end ratios will take a 15 tooth drive gear. There are two driven gear housings, one for 34 through 39 tooth driven gears and one for 40 through 45 tooth driven gears. Look at the bottom of the speedometer face for the numbers 940, 960, 1000, or 1020. These numbers are the number of revolutions the speedometer cable must turn in one mile of travel. Your speedometer may or may not show a number. Most speedometer from 1965 on use 1000.

A spring clip retains the speedometer drive gear on the transmission output shaft.

Twelve speedometer driven gears are available for the 700R4 / 4L60 transmissions to calibrate the speedometer with various axle ratios and tire diameters. The number on the driven gear housing must match the number of teeth on the driven gear. Unless driven gears with more than 45 teeth and / or drive gears with fewer than 15 teeth become available, it will be impossible without using a ratio adapter to have an accurate speedometer with rear end gear ratios lower (higher numerically) than 4.10:1, unless 27 inch or larger tires are installed.

To determine your tires true diameter in relation to determining what speedometer gears you need, measure from the ground up to the center of the axle then multiply by two. The actual run out of the tire can be as much as 2 to 3 inches less than what the circumference of the tire measures. In effect your tire has two diameters.

To determine your rear end ratio, raise both tires off of the ground, turn both tires at the same time one complete turn, at the same time count the turns of the drive shaft, this is your ratio.

With 15 Tooth Drive Gear
Axle Ratio	Tire Height	Driven Gear Teeth
4.56	33	42
4.56	35	39
4.10	26	45 will work, but will read about 3 MPH fast at 50 MPH.
4.10	27	45
4.10	28	44
4.10	29	43
4.10	30	41
4.10	31	40
4.10	33	38
4.10	35	35
3.73	26	43
3.73	27	42
3.73	27 1/2	41
3.73	28	40
3.73	29	39
3.73	30	38
3.73	31	36
With 17 Tooth Drive Gear
Axle Ratio	Tire Height	Driven Gear Teeth
3.73	28	45
3.73	29	44
3.42	26	45
3.42	26 1/2	44
3.42	27	43
3.42	28	42
With 18 Tooth Drive Gear
Axle Ratio	Tire Height	Driven Gear Teeth
3.23	26	45
3.23	26 1/2	44
3.23	27	43
3.23	28	42

#54-2. 700R4 Speedometer gear housing for 40 to 45 tooth driven gears (aluminum not plastic) (also fits Olds TH350). Comes with a new gear seal, O-ring, bolt and retainer. Complete after market kit less gears. (OUT OF STOCK) Cost $67.00

#54. 700R4 Speedometer gear housing for 40 to 45 tooth driven gear (aluminum not plastic) (also fits Olds TH350). Cost $69.00

#54. 700R4 Speedometer gear housing for 34 to 39 tooth driven gear (aluminum not plastic) (also fits Olds TH350). Cost $47.00

#54U. Good Used Speedometer gear housing for 40 to 45 tooth driven gear (aluminum not plastic). (OUT OF STOCK) Cost $28.00 Qty
#54U. Good Used Speedometer gear housing for 34 to 39 tooth driven gear (aluminum not plastic). Cost $12.00 Qty

#54P. 700R4 Speedometer gear housing for 34 to 39 tooth driven gear (plastic not aluminum) (also fits Olds TH350). Cost $12.00 Qty
The above and below 700R4 parts also fit non-Chevy TH350 transmissions. Speedometer Cables

#54X. Speedometer drive gear, comes in 15, 17, 18 or 19 tooth. Cost $11.00

#54XX. Speedometer driven gear, comes in 34 to 45 tooth. Cost 11.00. (Also fits 208 transfer case.)

34 to 39 Teeth

40 to 45 Teeth

Speedometer Calculator, Click Here

15 Tooth	17 Tooth	18 Tooth	19 Tooth

Retainer, Cost $7.00

5/16" Clip, Cost $3.50

O-Ring, 700R4 housings come without this O-ring. Cost $1.50

Gear seal, new 700R4 aluminum housings come with this seal, used or plastic housings don't come with this seal. Cost $1.50

#208. This is a 15 tooth speedometer drive gear for a GM 208 transfer case. (We know where to get more for $199.00 each, our cost ! ! !) (OUT OF STOCK) New Old Stock. Cost $59.00

#208D. This is a 13 tooth speedometer drive gear for a GM 208 transfer case. This is actually a Dodge 208 transfer case drive gear, but will work on a GM 208 transfer case if you make a .293" spacer from your old GM gear and use it as a shim on one end. Cost $32.00

#13. Chevy / GMC 13 tooth, 38 spline transfer case speedometer drive gear. Fits some 1988 up Chevy / GMC 241 transfer cases. Cost $19.00

#205. This is a 7 tooth speedometer drive gear for a GM 205 or 203 transfer case. Also fits most Dodge Ford 205 or 203 transfer cases with a steel driven gear. Cost $19.00

Fits 700R4 / 4L60E and Electronic T-5 Transmissions

#55. Driven gears for gear driven electronic speedometers, 34 to 45 tooth (no 36, 38, 40, 41, 45). Use with #54X drive gear above. Cost $11.00.

34 to 39 Teeth

42 to 44 Teeth

#55X. Speed sensor for above 34 to 39 tooth driven gear. (Black) $89.00

#55XX. Speed sensor for above 40 to 45 tooth driven gear. (White) $69.00

These sensors will fit a C4 Corvette if used with the correct pig tail, #120. These two sensors put out 4 pulses per turn. A four pulse sine-wave (A.C. current or alternating current) signal is required by the 1990-1993 TPI, 1992-1993 LT1 engines and 1990-1993 Camaro 3.1 / 3.4 V6 engines.

#55B. Speed sensor for above 34 to 45 tooth driven gears with speed sensor and speedometer drive. We must know what gear tooth count you're going to use with the sensor. This is needed for an EFI conversion. Cost $84.00

34 to 39 Tooth

40 to 45 Tooth

This sensor puts out 4 pulses per turn. A four pulse sine-wave (A.C. current or alternating current) signal is required by the 1990-1993 TPI, 1992-1993 LT1 engines and 1990-1993 Camaro 3.1 / 3.4 V6 engines.

#70XXX. 4L60E Output Speed Sensor. Fits late 1996 up except Corvette. Cost $22.00

#70. 4L60E / 700R4 early type speed sensor (VSS). Cost $43.00

#70X. 4L60E / 700R4 speed sensor rotor ring (reluctor). Cost $8.00

A 40 pulse per driveshaft revolution speed sensor is used on 1993 and newer trucks with automatic transmissions, plus 1994 and newer rear wheel drive cars with automatic transmissions.

200-4R Speedometer Gears

Most cars with low rear end ratios will take a 10 tooth drive gear. The drive gear is part of the governor assembly which is located inside the oil pan. The gear can be replaced separately by removing the retainer clip on the governor shaft.

Drive Gears	Driven Gears
10 teeth - green	27 teeth - black
11 teeth - orange	28 teeth - yellow
12 teeth - red	29 teeth - green
13 teeth - white	30 teeth - blue
	31 teeth - white

With 10 Tooth Drive Gear
Axle Ratio	Tire Height	Driven Gear Teeth
4.10	26	31 will work, but will read about 2 MPH fast at 50 MPH.
4.10	27	31
4.10	28	30
4.10	29	29
3.73	26	29
3.73	27	28
3.73	28	27
With 11 Tooth Drive Gear
Axle Ratio	Tire Height	Driven Gear Teeth
3.73	27	31
3.73	28	30
3.42	26	29
3.42	27	28
3.42	28	27
With 12 Tooth Drive Gear
Axle Ratio	Tire Height	Driven Gear Teeth
3.23	26	30
3.23	27	29
3.23	28	28

#55R. 200-4R O-Ring. Cost $2.00

#68R. Chevy TH350 / 200-4R Speedometer Housing Retainer. Cost $4.00

#55X. 200-4R speedometer drive gears. Cost 10 Tooth $55.00. The 11, 12 and 13 tooth gears are no longer available.

10Tooth

#55-12. New 12 Tooth 200-4R Drive Gear. Cost $29.00

#55N. New 200-4R steel speedometer housing. Cost $39.00

#55. 200-4R steel speedometer housing (good used, OUT OF STOCK). Cost $24.00

#55XX. 200-4R speedometer driven gear. Cost 27 to 30 Tooth $11.00, 31 Tooth $14.00

27 to 30 Tooth

31 Tooth

Speedometer Calculator, Click Here

Speedometer Cables

#55S. 200-4R 30 Tooth Steel Shaft Driven Gear. $15.00

Call on availability of good used 200-4R steel shaft driven gears. Cost $9.00

#1964. Custom made GM 1964 back, left hand gear with a .810" or .875" head. Comes in 17 to 25 tooth gear count. We need to know stem length, gear length and stub length. Fits some standard transmissions, maybe some automatics. Call 1-888-8771008 to place order. Cost $49.00

#PG1. Early Powerglide / 3 speed standard Speedometer Driven Gears. Comes in 20, 21, 22, 24 and 25 tooth. The 20 and 21 tooth Powerglide gears have a .785" diameter head and the 22, 24 and 25 tooth three speed standard gear has a .865" diameter head. The overall length runs 2.890" to 2.900". If your speedometer is still off with one of these gears installed it can be corrected with a ratio adapter. Cost $39.00

#68X. Speedometer gears for a Chevy TH350 transmission with 26 inch tires and 4.10 gears. 7 tooth drive gear and 22 tooth driven gear. Cost $22.00 for both, drive gear $11.00, driven gear $11.00. We also have 8, 9 and 10 tooth drive gears, and 17, 18, 19, 20, 21 and 22 tooth driven gears. (The driven gears also fit Super T-10 and Chevy T5 transmissions.)

Drive Gear

Driven Gear

#68XX. Chevy TH350 speedometer gear housing, comes with both seals, no gear. (If you have an aluminum housing it needs to be replaced with this steel housing.) (Also fits T-5 and Super T-10.) Cost $9.00

TH350 5/16" Drive Gear Clip. Cost $3.50

Chevy TH350 Speedo O-Ring. Cost $1.50

#68R. Chevy TH350 / 200-4R Speedometer Housing Retainer. Cost $4.00

#68J. 207 Transfer Case Speedometer Driven Gear. Now available in right hand 21 tooth for 207 transfer cases in some Jeeps and GM. $25.00

#350E. Kit to convert your TH350 transmission to an electronic speedometer. This is used when your vehicle has an electronic factory speedometer and your transmission was converted to a TH350 gear driven type speedometer. This kit consists of a 8 pulse generator and an electronic ratio adapter to adjust the signal. Can be used to drive a speedometer cable at the same time. Cost $228.00

TH400 Speedometer Parts

#68-1. 34 through 45 tooth driven gear. Cost $11.00. (Also fits 208 transfer case.)

34 to 39 Teeth

40 to 45 Teeth

#68-2. Metal drive gear, 15 and 17. 15 Cost $11.00 and 17 Cost $15.00. 18, 19, 20 and 21 tooth Cost $26.00 when in stock. CALL BEFORE ORDERING! We have the 18 in stock now.

18 to 21

#68-3. Housing for 34 through 39 tooth gear. Cost $56.00. (Also fits 208 transfer case.)

#68-4. Housing for 40 through 45 tooth gear. Cost $56.00. (Also fits 208 transfer case.)

#68-3U. Good Used Housing for 34 through 39 tooth gear. Cost $17.00. (Also fits 208 transfer case.)

#68-4U. Good Used Housing for 40 through 45 tooth gear. (OUT OF STOCK) Cost $17.00. (Also fits 208 transfer case.)

#68-5. O-ring for housing. Cost $1.50

Gear seal, new TH400 aluminum housings come with this seal, used housings don't come with this seal. Cost $1.50

#64. Speed Sensor and Rotor (speedometer VSS) for the TH400 transmission. Comes with the O-ring. Cost $228.00 for both. Speed sensor $135.00. Rotor $93.00

Both Sensor and Rotor

Sensor Only

Rotor Only

TH400 Speedometer Housing Retainer. Cost $7.00

#68P. TH400 Speedometer Block Off Plug. Used on 4WD TH400 transmissions because the speedometer gears are in the transfer case. Cost $3.00

Super T-10 drive gear. 32 spline output shaft with 7 tooth drive gear. The driven gears are the same as a Chevy TH350. (OUT OF STOCK) Cost $69.00

These fit T-10, late fifties to late sixties such as 61 to 67 Corvette (not super T-10) and some Muncie. You must use this black drive gear to use these driven gears.

22 and 24 .874" tooth driven gears. The 23 and 25 tooth gears are no longer made. Cost $12.00

8 tooth 1.760" drive gear. Cost $22.00

GM T5 Gears

#T5DV. GM T5 driven gears with 19 or 22 teeth. Cost $42.00. You can also use a Chevy TH350 17 to 22 tooth driven gear in a Chevy T5 transmission. (OUT OF STOCK)

19 Tooth

22 Tooth

#T5DR. GM T5 drive gear with 7 or 9 teeth. Cost $30.00

#MUN. Muncie 8 Tooth Steel Drive Gears. The one on the left takes a 1.375" shaft. The one on the right takes a 1.175" shaft. Cost $24.00

#125BOP. Fits 1985 to 1991 Buick Somerset / Skylark, Pontiac Grand Am / Fiero, Olds Cutlass. Maybe a 125C automatic or standard, not sure. This is a 29 tooth driven gear. Cost $19.00

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Speedometer Calibration

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