How do I find out which rear end I have? '72 elco 350ci 10 bolt. Is it an 8.2 or 8.5?
big gear head
08-30-2012 10:32 AM
The 8.2 has a 1 1/8 inch pinion nut and the 8.5 has a 1 1/4 inch pinion nut. The 8.5 has some square corners on the bottom of the casting in the 5 and 7 o'clock positions that can be easily seen from the rear of the car.
You have to be carefull about judging a rear end by it's cover. The Chevy 8.2 and 8.5 covers interchange. I've got a few 8.2 rear ends right now that have 8.5 covers on them, and I know a few people who have installed 8.2 covers on their 8.5 rear ends to make them look like the 8.2.
08-30-2012 12:54 PM
I didn't know those 2 would interchange.:cool:
Hard to miss those Square lugs on the 8.5" tho'.