Our transmission rebuild kits are of the highest quality and meet all standards set by professional installers High quality Japanese manufactured bearings (Nachi and Koyo) Includes: bearings, small parts kit manufactured in USA, seals, gaskets Includes; Synchro Rings Compatible With: GM Chevy Getrag 290 or NV3500 5 Speed transmission rebuild kit is a complete rebuild with synchro rings. You can identify this transmission by its aluminum case, 3rd design. The transmission uses thin (0.90 inch) input and output bearings, 30 millemeter outside diameter front & rear countershaft journals and (3) piece synchro rings for 1st and 2nd gear. The outer rings and the inner rings are NOT included in this kit. This kit only includes the middle fiber lined 1st and 2nd gear rings because they are the only pieces that wear. This kit includes all the bearings, synchro rings, seals, gaskets, complete small parts kit (That includes snap rings, thrust washers, needle bearings, etc.)