Thirdgen 3.42/3/45 differential

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Old 10-03-2018, 05:40 PM
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Car: 1988 IROC-Z
Engine: 350 TPI
Transmission: T56 swap ongoing
Axle/Gears: 2.77 9-bolt Posi
Thirdgen 3.42/3/45 differential

Doing a T56 swap in my '88 IROC, and the 2.77 rear simply has to go. Looking for a thirdgen 9 or 10 bolt, 3.42 or 3.45, or slightly higher.. preferably posi within a reasonable drive from Knoxville, Tennessee. I intend to pick it up myself.

Disc would be nice, but not absolutely necessary, but would like to find something that's good to simply install in my car...the T56 stuff has just about bankrupted me, so I'd rather not have to tear into whatever I buy.
Old 10-16-2018, 11:16 PM
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Car: 1988 IROC-Z
Engine: 350 TPI
Transmission: T56 swap ongoing
Axle/Gears: 2.77 9-bolt Posi
Re: Thirdgen 3.42/3/45 differential

No one?
Old 10-22-2018, 04:10 PM
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MKM
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Car: 88 Trans-am GTA
Engine: 400 Small block
Transmission: T-5
Axle/Gears: 3.42-3.73
Re: Thirdgen 3.42/3/45 differential

I have one but I am in Texas.
No brakes. Have the backing plates just no calipers.

Mark
Old 10-22-2018, 04:46 PM
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Car: 1988 IROC-Z
Engine: 350 TPI
Transmission: T56 swap ongoing
Axle/Gears: 2.77 9-bolt Posi
Re: Thirdgen 3.42/3/45 differential

Originally Posted by MKM
I have one but I am in Texas.
No brakes. Have the backing plates just no calipers.

Mark
Texas would probably be a bit far...easy 3 day trip getting there an back, but thanks for thinking of me!
Old 10-24-2018, 08:03 AM
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Car: Camaro
Engine: Carbed L98
Transmission: TH350
Axle/Gears: 3.73
Re: Thirdgen 3.42/3/45 differential

I had 2.73 gears in mine. I just bought a 3.73 gear to fit the carrier and had it installed.
Its a thicker gear to fit, but works great. This may be a option for you.
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