7.5 POSI ???

boostedwagon

Weekend Racer
Mar 16, 2009
57
0
0
chicago, IL
Would a posi from a 7.5 from a third or fourth gen camaro/firebird fit my stock malibu wagon rearend. I plan on going with a 9'' later but just wanna have some fun for right now and get my feet wet. Also if I do get a posi from say a 97 Z28 can I put 4.11 gears in that 7.5 or whats the biggest I can go.
 

DOUG213XRJ

MalibuRacing Junkie
Sep 18, 2006
4,671
1
38
West, MI
boostedwagon said:
Would a posi from a 7.5 from a third or fourth gen camaro/firebird fit my stock malibu wagon rearend. I plan on going with a 9'' later but just wanna have some fun for right now and get my feet wet. Also if I do get a posi from say a 97 Z28 can I put 4.11 gears in that 7.5 or whats the biggest I can go.
Third gen Camaros pre 88 will fit becouse they have the same 26 spline count . 89 and newer hase 28 spline count. The 1989 and newer gears will work on the 1978-83 Malibu wagon.
 

DOUG213XRJ

MalibuRacing Junkie
Sep 18, 2006
4,671
1
38
West, MI
boostedwagon said:
So, it would be easier and cheaper for me to just find a monte ss rearend right. I see alot of those in the junkyards
NO, Look at the S-10 inthe glove box they have a code tag look for a G80 code .G80 is the code for a posi.
 

Doober

Moderator
Jun 2, 2003
14,704
1
38
Catalina, AZ
www.cardomain.com
Also make sure you're not getting a gov-loc posi, they're not quite so tough.
gov-loc
gov-lock.jpg


cone type
4023d1233370833-12-bolt-rear-end-chevy-12-bolt-factory-posi.jpg
 

boostedwagon

Weekend Racer
Mar 16, 2009
57
0
0
chicago, IL
What year S10's should I be looking for for the posi????????? I'm going to the junkyard this weekend and am gonna look. I always thought the smaller blazers where still 8.5 rearends.
 

boostedwagon

Weekend Racer
Mar 16, 2009
57
0
0
chicago, IL
I'm not worried about the axle spline right now, I don't mind buying a set of 28spline axles if thats all it takes to use the later 7.5 posi. So other than the spline difference will a third or fourth gen 7.5 posi work??
 

slim69

Amateur Racer
Mar 7, 2009
184
0
0
Henderson, ky
look for 2.8l s10 blazers and s10s 4x4 they got 373 or 411 in them or i got both 373 or 411 i would sell for 60.00 plus shipping as for the posi if you just want to have fun for right now you can buy a mini spool for about a100 bucks
 

boostedwagon

Weekend Racer
Mar 16, 2009
57
0
0
chicago, IL
I appreciate the info from you guys, but what I really need to know is if a 7.5posi from a LS1 car will fit in my rearend. My buddy just gave me his, with 25,000 miles on it so I want to use that, a 4:10 gear and I'll buy a set of axles 28spline to match the posi. IS THAT POSI GONNA WORK IN MY REAREND ](*,)
 

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