This transmission rebuild kit is for a GM Truck with the 3 Speed with Overdrive, MY6 NP833 Transmission for years 1980-87 BK130WS_Deluxe You can identify this transmission by its 10 bolt side cover and Iron Case that is 10-5/8" long. Note: This looks like a car type transmission. This kit includes all New Bearings, Seals, Gaskets, High Quality Brass Synchro Rings, Tail Housing Bushing, Countershaft Pin and Small Parts Kit. NOTE: The NP833 used a different countershaft pin based on the case. The pin included in this kit is 10.56" long and .954" diameter which is found in the iron case that is 10-5/8" long. Please verify this information before you order as the pin that is 10.37" long for the aluminum case is unavailable.