Ok I need to try and find out what read end I have under my frame here... The guy I got it from doesn't know and noone else I know or talked to knows either. A few people said maybe a 55 chevy but I don't think 55's had drain plugs under the differential. Anyways here are the numbers I got off of it just now...
on top there was three numbers:023 and then under that the numbers, 3725899GM33
Does anyone know what this may be or where I can go to find out and put those numbers in and see what it is? I looked at pictures and none looked like mine. All I know is that it has 10 bolts and the back of the differential is welded up not bolted up.

Any info is greatly appreciated. I need to try and find out in the next day or two before I head to the local junk yards to buy a new one. At first when everyone told me it was a 55 I was going to just go get a 9" but now that I hear it's not I am holding.
Oh one more thing... it has 3 73 gears in it.

Thanks again!


SMF-