Rear Axle Identification

JBreu

Royal Smart Person
Jul 15, 2008
2,168
20
38
Livonia, New York
1980Halfbreed said:
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

blank
Mar 31, 2006
29,270
20,391
113
Kitchener, Ontario
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?

file.php
 

JBreu

Royal Smart Person
Jul 15, 2008
2,168
20
38
Livonia, New York
pontiacgp said:
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?

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

PapaSmurf86

Not-quite-so-new-guy
Jan 26, 2012
34
1
0
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?


kolt402_zps1106e00c.jpg
 
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martin.ca

Greasemonkey
Jun 30, 2008
150
0
16
Wet Coast of Canadia
thegrandprixsniper said:
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

Greasemonkey
Nov 19, 2012
178
1
18
Delta B.C.
^^
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

Greasemonkey
Jun 30, 2008
150
0
16
Wet Coast of Canadia
Ideally...

axlecodeloc.gif


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.
 

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