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.
Check out all of our Speedo Gears here
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.
Check out all of our Speedo Gears here
| Tire Size | 44" | 42" | 40" | 38" | 36" | 35" | 34" | 33" | 32" | 31" | 30" | 29" | 28" | 27" |
| 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 |
| Tire Size | 44" | 42" | 40" | 38" | 36" | 35" | 34" | 33" | 32" | 31" | 30" | 29" | 28" | 27" |
| 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 | - | - | - |
