Which 10 Bolt is this?

I'm almost sure this rear end is what came with my `72 Skylark. It originally had a 350-4 motor. I also know the axles are bolted in, and the front axle tube on the passenger side is stamped LK B222 1. Check it out...

 

Yes

8.5 rear

 

Thanks speed70, how was this determined? I've been looking online and could not find matching axle housing numbers, or other confirming information. Was it the square flange at the bottom? Thanks!

10.5 = strong like bull :TU:

 

Wow that has some highway gear in it..

LK is an Open 2.56 rear.

http://www.atlantabuick.com/Specs.htm#VIN Decoder

 

This original gear with the current 27+ diameter tires would be like overdrive in todays new cars!

Cover contains 3.42's now.

 

The squared off ears on the bottom are a good sign, but also the four bumps around where the axle tubes go into housing indicate an 8.5 rear.

 

An 8.2 rearend has a smooth center section end where the axle tubes go into it.

 

Phil, do you mean at location A or B?

 

Location "B".

 

rear

8.5 10 bolt buick 28 spline axle.

 

if you want to know if its the strong one pull the yoke count the splines,30 splines is the good one, :TU: it would than have the 1 5/8 pinion like the 12 bolt :Comp: bob

 

rear

8.5 absolute money down on it.