43-Piece Aluminum Bearing Race and Seal Driver Set with Case

A 43-piece driver kit for pressing bearing races, seals and bushings in straight without cocking them in the bore. It includes 39 aluminum driver discs, four handles in different lengths, a molded case and a pair of work gloves. The black discs are SAE, stepped from 3/8 x 7/16 in. up to 1-3/16 x 1-5/16 in., and the red discs are metric from 10-12mm up to large 72mm, 76mm and 81mm plates for the big races and seals.

On a transmission or drivetrain job this is the kit you reach for when a seal or race has to go in flat: extension housing and output shaft seals, front pump seals, transfer case output seals, and pinion and carrier bearing races in axle housings, along with the usual hub and wheel bearing races. Pick the disc that matches the outside diameter of the race or the seal case, thread it onto the handle, and drive it home with a hammer or a press. Because the disc spreads the load across the full face, you are not chasing the part around the bore with a punch.

The discs are aluminum, softer than the races and seal cases, so they carry the blow without marking or distorting the part. A seal that goes in crooked or gets dented on the lip is one of the common reasons a fresh rebuild weeps at the tail housing or pump, and a race knocked in out of square will ruin a new bearing fast. Always check the seal depth against the old one and make sure the race is fully bottomed against its shoulder before final assembly.