Will it fit?

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MWA

Greasemonkey
May 4, 2009
129
1
18
MCDonough,GA
Will a posi unit out of a 1998 camaro fit in a 7.5 housing? Has any body put in a posi unit if so what will fit and ring and pinion. I want to put a posi in and come with a 3.73 gear. Can anybody help with some part numbers
 

85GPLef41

Royal Smart Person
Nov 14, 2008
2,210
159
63
Colorado
Yeah it should fit with no issues both ring and pinion along with posi unit, part numbers I don't know off hand. But seeing as it's a 98 Camaro i'm assuming its a a Zexel torsen unit right? If so I helped my buddy redo his 7.5in axle along with 28 spline GN axles and a girdle holding up to his lt1!
 

truracer20

Master Mechanic
Feb 16, 2014
492
31
28
western PA
Check the spline count on the Camaro carrier and on your current carrier. I believe the Camaro carrier has 28 splines and your axle originally had a carrier with 26 splines. 28 Spline axles can be found used or bought new. Summit and Jegs among others have all the parts, buy axles based on your car, with the correct splines for the new carrier, Buy gears based on info from the Camaro you get the carrier from.
 
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theoldsone

G-Body Guru
Dec 26, 2014
799
246
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Check the spline count on the Camaro carrier and on your current carrier. I believe the Camaro carrier has 28 splines and your axle originally had a carrier with 26 splines. 28 Spline axles can be found used or bought new. Summit and Jegs among others have all the parts, buy axles based on your car, with the correct splines for the new carrier, Buy gears based on info from the Camaro you get the carrier from.
I've run into that before, and let me tell you it was very very unpleasing to find that out.
 

MWA

Greasemonkey
May 4, 2009
129
1
18
MCDonough,GA
Yeah it is a Zexel torsen unit. It as has a 28 spline. What is a good brand name gear for performance? So am I going to need to buy new axles too?
 

Yav8

Master Mechanic
Aug 19, 2014
275
114
43
Manitowoc wis.
I did the very same thing, using a 2000 Camaro posi and installing a set of moser axels with 28 splines and a braced cover on the back.
 

truracer20

Master Mechanic
Feb 16, 2014
492
31
28
western PA
Yeah it is a Zexel torsen unit. It as has a 28 spline. What is a good brand name gear for performance? So am I going to need to buy new axles too?
If you want to use 3.73 gears you have to be sure to get a carrier from a car that came with stock gear codes, GU3 (3.08), GU5 (3.23) or GU6 (3.43) rear gears. Preferably GU5 or GU6.
I would use gears from any of the name brand manufacturers, And yes you need new axles. Moser axles P/N A102801 are about $260, I believe these use a 7/16 wheel stud
Moser axles P/N A102808 should use 12mm wheel studs BUT you have to check with them yourself to be sure.
 

pontiacgp

blank
Mar 31, 2006
29,270
20,391
113
Kitchener, Ontario
If you want to use 3.73 gears you have to be sure to get a carrier from a car that came with stock gear codes, GU3 (3.08), GU5 (3.23) or GU6 (3.43) rear gears. Preferably GU5 or GU6.
I would use gears from any of the name brand manufacturers, And yes you need new axles. Moser axles P/N A102801 are about $260, I believe these use a 7/16 wheel stud
Moser axles P/N A102808 should use 12mm wheel studs BUT you have to check with them yourself to be sure.

The 3.08 is the lowest that fits a 2 series carrier on a G body carrier...
 

truracer20

Master Mechanic
Feb 16, 2014
492
31
28
western PA
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