GM Muncie Transmission 1963-65 Rebuild Kit This transmission kit is one we sell everyday to Transmission Shops, it fits all the 1963-65 GM Muncie Manual Transmissions with the 7/8" Countershaft Pin! You can identify this transmission by the cast aluminum case, 7 bolt side cover, it uses the 7/8" countershaft pin and an 80mm outside diameter input bearing. This kit comes with all the bearings, seals, gaskets, high quality synchro rings, 7/8" countershaft pin, tail house bushing, complete set of keys & springs and small parts kit (That includes snap rings, thrust washers, needle bearings, etc.)