GM Getrag 290 5 speed Transmission Rebuild Kit for the 1991-ON GMC Full Size truck and Van. MG5, HM290 Transmission Rebuild Kit This complete kit includes narrow front and rear main shaft bearings, input pocket bearings, seals, a front counter plug, a complete small parts kit which includes snap rings, washers etc. You can identify this transmission by the aluminum rear loaded case. This kit is for the "3rd Design" Getrag 290 transmission. The transmission uses a thin (0.90") Input and Output Bearings and Countershaft Bearings that are 1.180" Inside Diameter The input and output bearings are single ball type