Speedometer Gears

For Jeep models including the 1993-2006 Wranglers, 1993-2001 Cherokee XJ, and 1993-1998 Grand Cherokee ZJ, upgrading to larger tires from factory specifications can significantly impact both speedometer accuracy and odometer readings. This discrepancy occurs because the larger tire circumference changes the rate at which the vehicle's drive train turns, leading to incorrect speed and mileage calculations. To rectify this, it is essential to replace the factory speedometer gear with one that corresponds accurately to the new tire size and axle gear ratio. These gears are color-coded for straightforward identification and can be conveniently installed at the rear of the transfer case tail housing, ensuring accurate readings after tire modifications.