Rear Axle Identification

[JBreu]

Needing some info. I'm on my 4th rearend because its the weakest link and now its time to get serious but not broke. Besides another g-body because 8.5 g-bodys are difficult to find what other chevy 8.5 is close to a bolt in. I've heard that A body chevies are close but need tweaking for the upper control arms. I have a 9 inch from a versailles but finding a competent welder is scarce in my neck of the woods.

Try grabbing a 12 bolt rear from a 66-72 A body......they are close to a bolt in deal...All ya gotta do is swap out the control arms...UMIPerfoprmance has the 12 bolt swap kit..here this should also help ya in your search..http://www.maliburacing.com/faq.html#stock_rearend

 

[pontiacgp]

JBrue, I think you mean the 68-72 rear is bolt in with the conversion uppers. Here's my 67 rear with the lowers I had made by UMI. The bracket for the lowers on the 64-67 are closer to the center of the axle than the G body. Remember the laugh we had when I described what my sway bar looked like and the difficulty I had to get it in?

 

[JBreu]

JBrue, I think you mean the 68-72 rear is bolt in with the conversion uppers. Here's my 67 rear with the lowers I had made by UMI. The bracket for the lowers on the 64-67 are closer to the center of the axle than the G body. Remember the laugh we had when I described what my sway bar looked like and the difficulty I had to get it in?

Oh yeah that's right.......lol

 

[79cutlasssalon442]

Yay.. 2BH here. Factor posi still. Instant 2 wheel peel. No slack. But terrible gears

 

[PapaSmurf86]

i just picked up a 8.5 i believe. Heres a pic with the 7.5 10bolt cover nxt to the cover of the 8.5. The cover on 8.5's are more round compared to a 7.5 pan. The ears are more squared off on the 8.5 rather then fang lookings ears. And it has 28 spline axles.
This number is on the center section. 14075742
Is this a 8.5?

 

[pontiacgp]

That's an 8.5 ....time to open it up and see what's inside

 

[thegrandprixsniper]

are 7.5 26 spline rear ends open differential cuz i would like to install a mini spool in mine can i ????

 

[martin.ca]

are 7.5 26 spline rear ends open differential cuz i would like to install a mini spool in mine can i ????

7.5" and 7.625" 26 spline axles did sometimes come with a "posi". I've an '81 with a 2-series axle and limited-slip diff.

 

[vonclod]

^^
my 86 regal is a 7.5 and has a posi from the factory

can anyone tell me where exactly on the axle tube will i find the gearing?
thanx

 

[martin.ca]

Ideally...

But on mine, I found it easier to look up the RPO codes from the VIN via the big book behind the GM parts counter. And it had been already changed in the past.