Contains Bearings, Seal and Other Components Needed to Rebuild the Differential DT Component rebuild kits are available in standard and master kit versions. Kits containing MK suffix indicate master kit. DT Components rebuild kits contain the bearings and seals needed to complete the job Timken markets differential, transfer case and transmission kits under the DT Components brand Aplication Summary: REAR AXLE-Differential Rebuild Kit FOR TK 3/4 (1998-08), FOR TK 1 (1999-08), FOR MD (2003-07).