V6 Discussion and questions about the base carbureted or MPFI V6's and the rare SFI Turbo V6.

Is my rear end 7.5"?

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Old Jan 18, 2011 | 07:14 PM
  #1  
nezzie09's Avatar
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From: ON, Canada
Car: 1987 Camaro Sport Coupe
Engine: 2.8 MPFI
Transmission: 5-Speed Standard
Axle/Gears: 3.42
Is my rear end 7.5"?

I've done a search and just want to confirm.
Is my 1987 2.8l t5 Sport Coupe a 7.5" rear end? It has 3.42 gears.

I'm just asking because I found a good deal on a third member with posi and I really wanted to switch but it's for a 8.5"

Thanks
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Old Jan 18, 2011 | 07:29 PM
  #2  
//<86TA>\\'s Avatar
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From: Central NJ
Car: 86 Trans Am
Engine: 408 stroker sbc
Transmission: TKO600
Axle/Gears: Moser full floater m9, 3:70 trutrac
Re: Is my rear end 7.5"?

you have a 7.5/7.625 ( you have a 7.625, but gears are the same between the 7.5 and 7.625, but the carrier is a littel different internally).

the 8.5 piece wont work
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Old Jan 18, 2011 | 07:32 PM
  #3  
nezzie09's Avatar
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Joined: Mar 2010
Posts: 128
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From: ON, Canada
Car: 1987 Camaro Sport Coupe
Engine: 2.8 MPFI
Transmission: 5-Speed Standard
Axle/Gears: 3.42
Re: Is my rear end 7.5"?

Originally Posted by //<86TA>\\
you have a 7.5/7.625 ( you have a 7.625, but gears are the same between the 7.5 and 7.625, but the carrier is a littel different internally).

the 8.5 piece wont work
That's what I figured. Thanks.

7.5 gm auburn 26 spline posi

Will that unit fit? If not, what am I looking for to change to posi?
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Old Jan 18, 2011 | 08:40 PM
  #4  
JamesC's Avatar
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From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Is my rear end 7.5"?

General info in the link to following may be helpful:

https://www.thirdgen.org/forums/tran...-10-bolts.html

JamesC
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Old Jan 18, 2011 | 09:54 PM
  #5  
nezzie09's Avatar
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Joined: Mar 2010
Posts: 128
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From: ON, Canada
Car: 1987 Camaro Sport Coupe
Engine: 2.8 MPFI
Transmission: 5-Speed Standard
Axle/Gears: 3.42
Re: Is my rear end 7.5"?

Will a 7.5/8 eaton posi 28 spline fit in my carrier if I switch my axles?
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