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
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Compatible With: GM Chevy SM420 4 speed transmission rebuild kit is a complete rebuild kit. You can Identify this transmission by 1 PTO opening, and the transmission has an iron case that is 10.5 inches overall length with a cast iron top cover. This kit includes all the bearings, seals, gaskets, and complete small parts kit (That includes snap rings, thrust washers, needle bearings, etc.)