1951 3100
Need some help on this one. Supposedly, this is the transmission that came in the truck. Of course, I have no way of knowing that, but I'm assuming it's at least correct for the year. Near as I can figure, it should be a Muncie SM318. It has the 4-bolt cover plate on the side, (side shifter of course), and it is a torque tube set up. Everything inside appears to be tight and working correctly, but I have an issue inside the tail housing. The spacers, the sleeve, and the drive gear that mates to the speedometer gear, were all rattling around in the tail housing. They were not on the output shaft, as logic tells me they should be. What's the chances of anybody having a picture breakdown of this transmission? I can reassemble, but I really need to know the order they go in.
Casting number on the case.....3686382 GM
Casting number on the shifter cover..GM 591615
This number was stamped,not cast, on the face plate of the tailhousing......HO-76693.
I've searched and hunted, but these numbers don't seem to come up anywhere.
