43-Piece Bearing Race and Seal Driver Set, Metric and SAE

A 43-piece driver kit: 23 metric discs from 10 mm to 91 mm, 16 SAE discs from 3/8 in. to 1-3/8 in., and four knurled handles, all in a molded case. The discs are machined aluminum with a coated finish, so they will not mar a seal case or a bearing race the way a steel socket or a punch does.

Transmission and drivetrain uses: front pump seals, extension housing and output shaft seals, transfer case input and output seals, axle seals, pinion seals, and pressing in bearing cups and outer races in diff carriers, hubs and transfer cases. Pick the disc that matches the outside diameter of the seal or race (it should sit on the case without touching the bore), thread it onto a handle, start the part square by hand, and drive it in with light hits from a dead-blow or leather mallet until it is flush or seated against the shoulder.

A seal tapped in crooked with a socket is the most common reason a fresh rebuild leaks at the front pump or tail housing within a few hundred miles. A disc that loads the whole seal case evenly keeps it square and keeps the lip from rolling.