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

Rebuilding Rear - Do I need a new axle?

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Old

Oct 30, 2003 | 07:11 PM

#1

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Joined: Feb 2003

Posts: 191

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From: Livermore, CA

Rebuilding Rear - Do I need a new axle?

I'm rebuilding my 3.42s with an open differential. I want to replace the open differential with a posi unit. Do I need to get a new axle?

Thanks.

-AJ

Old

Oct 30, 2003 | 07:31 PM

#2

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Joined: Jun 2003

Posts: 181

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From: NC

Car: 1992 Camaro RS

Engine: 305 TBI

Transmission: GM T56

It depends on what kind of posi unit you're putting in and what year rear you have. For example, the SLP take-off requires 28-spline axles but a 1985 rear only has 26.

-Rippin

Old

Oct 30, 2003 | 08:55 PM

#3

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Joined: Feb 2003

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From: Livermore, CA

That is not good news to me. I have an 85 rear end. Any posi's use a 26 spline axle?

Thanks.

-AJ

Old

Oct 31, 2003 | 07:24 AM

#4

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Joined: Aug 1999

Posts: 14,811

Likes: 1

From: Jackson County

89 was when gm started making the change to 28 spline so any pre 89 and some 89 posi from any gm 7.5 ten bolt would work with your axles

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