Differential Bearing Kit - 25-2091A quality Rear Differential Rebuilb Kit from All Balls. Contains Bearings and seals required as per application. Your pinion shaft can be machined and the included repair sleeve installed, saving you hundreds of dollars. Precision high speed bearings are manufactured to ABEC3 standards. The Seals use double lips to stop dirt entering. Install this kit and enjoy trouble free riding for years to come.