1993-1998 Jeep Grand Cherokee ZJ Ring & Pinion Gears

Changing tire size without re-gearing leaves power and fuel economy on the table, and 1993-1998 Jeep Grand Cherokee ZJ Ring & Pinion Gears bring the drivetrain ratio back to where it needs to be. The right gear set restores acceleration, towing capability, and RPM range to where the engine operates most efficiently with the current wheel and tire combination.

 

Gear ratio selection should be based on the installed tire diameter and the primary use of the vehicle, with lower numerical ratios favoring highway cruising and higher ratios suiting off-road crawling and towing. Front and rear axle ratios must be matched identically on a four-wheel-drive ZJ, since running mismatched gears causes binding and drivetrain damage in part-time or full-time transfer cases.

 

Re-gearing is one part of a drivetrain project that usually includes several related upgrades. The broader category of what moves power through the ZJ lives at 1993-1998 Jeep Grand Cherokee ZJ Drivetrain Parts, and traction devices that work alongside the new gears are covered at 1993-1998 Jeep Grand Cherokee ZJ Lockers. The axle shafts and hubs that carry the load can be found at 1993-1998 Jeep Grand Cherokee ZJ Axles & Hubs.