200-4R Speedometer Driven Gear. Comes in 26 to 31 tooth gear count.

$ 15.00

Tooth Count

SKU: #55XX Categories: , Tag:

Description

200-4R Speedometer Driven Gear. Comes in 26 to 31 tooth gear count.

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 RatioTire HeightDriven Gear Teeth
4.102631 will work, but will read about 2 MPH fast at 50 MPH.
4.102731
4.102830
4.102929
3.732629
3.732728
3.732827
With 11 Tooth Drive Gear
Axle RatioTire HeightDriven Gear Teeth
3.732731
3.732830
3.422629
3.422728
3.422827
With 12 Tooth Drive Gear
Axle RatioTire HeightDriven Gear Teeth
3.232630
3.232729
3.232828

 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.

Additional information

Weight2 lbs
Dimensions6 × 6 × 5 in

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