Can dealerships recalibrate speedometer?
Dealership can now reprogram / calibrate speedometer and odometer for bigger tires.
When to replace the speedometer gear on a jeep?
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.
How to calculate the gear ratio of a jeep?
When you change your tire size you need to make sure you have the right gearing to get optimal fuel economy and power. A good way to calculate this is to multiply .12 by your Jeeps tire diameter (Example: .12 X 38″ = 4.56). Here at JeepHut we have a made an easy to read chart to help you decide what is on the best gearing for your Jeep.
What does the gear ratio on a speedometer mean?
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.
What’s the gear ratio on a Wrangler Rubicon?
Rubicon models come standard with a 4.10 rear gear ratio and also use a Dana 44 axle in the front with either a 3.73 or 4.10 gear ratio. Rubicon models also come with an electronically lockable differential for optimal traction while in 4WD.
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.
What should the gear ratio be on a Jeep Wrangler?
Jeep JK Gear Ratio Chart for the 3.6L and the Automatic Trans. *Note* Red cells are the minimum allowable gear set. Expect sluggish performance, minimal overdrive use, and low elevation trails. Green cells are acceptable gear sets for daily driving, constant overdrive use, and slightly complex trails with moderate elevation changes.
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.
How big is the rear axle on a Jeep Wrangler?
The YJ Dana 30 hold a reverse cut ring and pinion, but the TJs do not. Both TJs and YJs, however, use a 5×4.5 inch bolt pattern. Dana 35: This was an axle size used on most Jeep rear axles. They had a ring gear diameter of 7 and 9/16 inches. They came with either a 3.21 or 4.10 gear ratio.