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Jeep Speedometer Gear Tooth Chart

When putting larger tires or changing gear ratios in a Jeep the speedometer gear must also be changed to allow the speedometer to show an accurate speed.
If the ring and pinion and/or tire size has changed on your Jeep vehicle, then you will want to replace the factory speedometer gear with the corresponding gear on the chart below.  The chart lists the gear ratio and tire diameter to easily guide your purchase into the correct size application.  Please note that if your vehicle is equipped with an electronic speedometer, the vehicle will have to be reprogrammed for the gear and tires sized.

Having the speedometer read accurately is important both on and off the road.  This will correct over all speed readings, correct shown distance traveled, and allow the jeep computer to properly shift your transmission (applies to Automatic transmission only).  Factory speedometer gear variances can be ±5% from the actual speed shown.  The recommended speedometer gear is based on the manufacturer's published tire specifications for revolutions per mile. 

Speedometer gears are quick and easy to install with simple hand tools.  Also suggested is the purchase of a new speedometer O-ring to prevent any leaks on the new installation.


93-06 Short Shaft Electric Driven Speedometer Gear Chart
 Tire Size/
Gear Ratio
 44"
Tire
 42"
Tire
 40"
Tire
 38"
Tire
 36"
Tire
 35"
Tire
 34"
Tire
 33"
Tire
 32
Tire
 31"
Tire
 30"
Tire
 29"
Tire
 28"
Tire
 27"
Tire
5.38 Ratio
34 36 38 40 42 43 - - - - - - - -
5.13 Ratio
32 34 36 38 40 41 42 43 - - - - - -
4.88 Ratio
30 32 34 36 38 39 40 41 43 - - - - -
4.56 Ratio
28 30 32 34 36 37 38 39 40 42 43 - - -
4.10 Ratio
- 26 28 30 32 33 34 35 36 37 38 39 40 41
3.73 Ratio
- - - 26 28 29 30 31 32 33 34 35 36 37
3.55 Ratio
- - - - 27 28 29 30 31 32 33 34 35 36
3.07 Ratio
- - - - - - - - 26 27 28 29 30 31


55-93 Long Shaft Cable Driven Speedometer Gear Chart
 Tire Size/
Gear Ratio
 44"
Tire
 42"
Tire
 40"
Tire
 38"
Tire
 36"
Tire
 35"
Tire
 34"
Tire
 33"
Tire
 32
Tire
 31"
Tire
 30"
Tire
 29"
Tire
 28"
Tire
 27"
Tire
5.38 Ratio
34 36 - - 42 43 - - - - - - - -
5.13 Ratio
32 34 36 - - 41 42 43 - - - - - -
4.88 Ratio
- 32 34 36 - - - 41 43 - - - - -
4.56 Ratio
28 - 32 34 36 37 - - - 42 43 - - -
4.10 Ratio
- 26 28 - - 33 34 - 36 37 - - - 41
3.73 Ratio
- - - - 26 28 - - 32 33 34 - 36 37
3.55 Ratio
- - - - 27 28 - - - 32 33 34 - 36
3.07 Ratio
- - - - - - - - 26 27 28 - - -


Article Type: 
Jeep Vehicle Information