Transmissions and Drivetrain Need help with your trans? Problems with your axle?

Rear End in a 1988 TransAm

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Old Jun 20, 2005 | 07:45 PM
  #1  
ThraxXx's Avatar
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Joined: Dec 2003
Posts: 758
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From: Ontario, Canada
Car: 1988 Pontiac Trans Am
Engine: 5.0L Fuel Injection
Transmission: Automatic 4speed /w OVerdrive
Rear End in a 1988 TransAm

We are doing some upgrades to my rear end. Actually I am gonna order some parts for it however I am getting asked some weird questions like 10 bolt or 12 bolt. .. so for a stock 88 transam with a 2.73 pegleg...what is the bolt on that? oh I believe its a 7.5" rear end
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Old Jun 20, 2005 | 07:59 PM
  #2  
Don 79 TA's Avatar
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Joined: Apr 2005
Posts: 447
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From: Long Island NY
Car: Hers: 88 Formula 350
Engine: TPI
Transmission: Auto
Axle/Gears: 10 bolt Posi
usually a 10 bolt 7.5" rear gear

summit sells a 10 bolt cover for this rear that is girdled

not sure what work you want to do to it

personally i'd save for a 9" or other aftermarket rear
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Old Jun 20, 2005 | 08:03 PM
  #3  
DJP87Z28's Avatar
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Joined: Mar 2003
Posts: 4,771
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From: Florida
Car: 1987 Black IROC-Z (SOLD)
Check the tech pages on this Site, and see what you have.
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Old Jun 20, 2005 | 08:11 PM
  #4  
ThraxXx's Avatar
Thread Starter
Senior Member
 
Joined: Dec 2003
Posts: 758
Likes: 1
From: Ontario, Canada
Car: 1988 Pontiac Trans Am
Engine: 5.0L Fuel Injection
Transmission: Automatic 4speed /w OVerdrive
basically I wanna go 3.73 gears with a posi unit.
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