How to quickly identify 8 3/4 rear axle housing?
#1976998
12/27/15 10:31 AM
12/27/15 10:31 AM
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Joined: Apr 2012
Posts: 1,562 Macomb, MI
vinnyd76
OP
pro stock
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OP
pro stock
Joined: Apr 2012
Posts: 1,562
Macomb, MI
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Today, I'm heading to look at an 8 3/4 axle housing for an A-Body with a friend. Are there specific features that can be identified to distinguish between an 8 1/4 vs 8 3/4? I believe the back of the center section between a 7 1/4 and an 8 3/4 are significantly different, but I'm not sure of differences between 8 1/4 and 8 3/4. Where is the part number located? On the shaft? Or on the outside area of the bowl where the center section attaches?
Last edited by vinnyd76; 12/27/15 10:44 AM.
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Re: How to quickly identify 8 3/4 rear axle housing?
[Re: cosgig]
#1978153
12/28/15 09:47 PM
12/28/15 09:47 PM
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Joined: Jan 2003
Posts: 43,522 Round Lake Beach, Illinoisy
Rhinodart
Rhinotruck
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Rhinotruck
Joined: Jan 2003
Posts: 43,522
Round Lake Beach, Illinoisy
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There are two different A-Body housings too. The brake "T" on the housing moved after 1970 so brake lines will be different, just for future reference. The best way is to bring a tape measure and use the measurements listed above especially if it is just a housing. The early B-Body housing is 1" different in the frame rail spacing. There was never a big bolt A-Body 8-3/4, but plenty of people change brakes and axles.
Last edited by Rhinodart; 12/28/15 09:50 PM.
The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.
JB Rhinehart, Realist
A-Body's RULE!
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Re: How to quickly identify 8 3/4 rear axle housing?
[Re: vinnyd76]
#1978556
12/29/15 02:13 PM
12/29/15 02:13 PM
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Joined: Jan 2003
Posts: 74,976 U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,976
U.S.S.A.
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Today, I'm heading to look at an 8 3/4 axle housing for an A-Body with a friend. Are there specific features that can be identified to distinguish between an 8 1/4 vs 8 3/4? I believe the back of the center section between a 7 1/4 and an 8 3/4 are significantly different, but I'm not sure of differences between 8 1/4 and 8 3/4. Where is the part number located? On the shaft? Or on the outside area of the bowl where the center section attaches? Should be pretty easy to tell an 8 3/4 from a 8.25 or a 7.25 , the 8 3/4 doesn't have a bolt on cover on the rear ... As far as telling one from the other ... tape measure ...
running up my post count some more .
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