1957-1966 GM Chevy T10 Transmission Deluxe Rebuild Kit with 7/8" counter shaft pin and extention housing bushing You can identify this transmission by its iron case, 9 bolt side cover and 7/8" countershaft pin. This transmission also uses a thrust bearing between 2nd and 3rd gear. NOTE: This kit includes the 307 input bearing which has an 80mm outside diameter. It is very important that you check your input bearing. If you need a rebuild kit with the 207 input bearing with a 72mm outside diameter, please see my other listing. This kit includes all new bearings, seals, gaskets, o-rings, complete small parts kit, 7/8" counter shaft pin, extention housing bushing and synchro rings. This small parts kit includes all the snap rings, washers, needle rollers, etc. You won't be short anything!