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

Axle swap

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Old 05-24-2010, 10:15 PM
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Car: 1990 Trans Am
Engine: 305 TPI L98 cam
Transmission: 700R4
Axle/Gears: 3.42 eaton
Axle swap

i am looking to do an axle swap and i am needing to know all the things that i will be needing

i know that i need the axle, corresponding ratio speedo gear, and a calpak tune??

Did i miss anything?
Old 05-24-2010, 10:25 PM
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Car: 83 Trans Am / 96 Jeep XJ
Engine: 355 / 4.0 I6
Transmission: TH350 / Auto
Axle/Gears: 3.23 10-bolt / 4wd
Re: Axle swap

If you are going from drum to disc, or disc to drum, some people recommend replacing the prop. valve to match the brakes. Peronally, I did not swap them when I went from drum to disc, and I have had no problems.
Old 05-25-2010, 07:22 AM
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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: Axle swap

The following link will provide some info that you may find interesting:

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

Concerning the combination valve, note that some members don't switch (and the brakes will still function); however, there's an increased bias from drum to disc to 1LE. For best brake performance, I'd use the correct valve--GM designed different valves for different systems for a reason.

JamesC
Old 05-25-2010, 09:54 PM
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Join Date: Sep 2009
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Car: 1990 Trans Am
Engine: 305 TPI L98 cam
Transmission: 700R4
Axle/Gears: 3.42 eaton
Re: Axle swap

i am just wanting to go drum to drum i just want to have the benefit of the 3.45 instead of broke 2.73 posi peg leg
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