Jeep Jk Gear Chart. Come join the discussion about performance, modifications, classifieds, reviews, engine swaps, troubleshooting, suspension, and more! The charts I found ranged from very good to bad.
If you wanted to swap out gears to match the tire change, you'd start with a calcluation like this: Old Gear Ratio * New Tire Size / Old Tire Size = New Gear Ratio. Jeep Grand Cherokee Articles & Reviews. Please note that if your vehicle is equipped with an electronic speedometer, the vehicle will have to.
The last field is the gearing options.
Note: This calculator is continually being updated.
The calculator below will give you an idea of what your engine RPMs will be running at any combination of gears, tires, and transmission. If you find that the parts you would like to use are not yet listed, please send the information to me at grimmjeeper@gmail.com and I will do my best to include. Part #: This started by me trying to find a good gear ratio chart for my JK.