I trying to identify the rear end in my 52 3/4 ton. I was very close to being able to drive it around the yard and went to bleed the brakes and the bleed screw snapped off (at least it made me think of spraying the other side with PB-Blaster). Since the truck had been sitting for 10 years I decided I might as well change out the wheel cylinder. The problem with that is I don't know what this rear came from. Previous owner said the guy before him put a nova rear in. He had so many trucks I can't trust his word. Its a GM 12 bolt, number cast into the housing on the front passenger side is NF3896838. Cast number on the other side is GM 60. Stamped on the front top of the passenger side axle tube is THB W166 1 E. I did a search in google for the cast number, a few things came up, a few chevy trucks in the 60's to 70's range. Some pictures to help http://i175.photobucket.com/albums/w124/rockfan1815/rear axle/PIC00012.jpg http://i175.photobucket.com/albums/w124/rockfan1815/rear axle/PIC00011.jpg http://i175.photobucket.com/albums/w124/rockfan1815/rear axle/100_0980.jpg Thank you for any help you can offer
This is the best way pop the cover off check the gears. If the can be read you try this or do a seach on this topic. I hope this helps
thanks for the replies guys I also posted this on a few other forums and got this: 1971 chevy c-10 pickup 3.07 ratio 12 bolt 8.875" it was just what I needed as I bought and installed the wheel cylinders and a plus is I have an idea of what may be the gearing (as long as it wasn't changed)
