It is the 48 Pitch 6 Gear tranny made for the old housing. Notice in the picture below the transmission on the left is the 32 Pitch standard transmission with the black upgrade gears, while the one on the right is the 48 Pitch tranny with the Jammin' Products thrust assembly (upper thrust bearing set inside) and with the spring-less tension adjust for the differential. The tension nut has 4 beveled washers for a more consistant tension onto the diff hub. I still have both of these tranny's, luckily.
