Posi Diff for 7.5" rear end 28 spline

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Aug 5, 2005 | 03:41 PM

ThraxXx

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

Posi Diff for 7.5" rear end 28 spline

Anyone out there have a Posi Diff for a 7.5" rear end @ 28 spline. I really want to upgrade my cars rear end from 2.73 one tire fire to a 3.73 posi. Was supposed to get one from my mechanic however he sold the car that the unit was on.

Aug 6, 2005 | 01:40 PM

305RSlc

Senior Member

Joined: Jul 2003

Posts: 646

Likes: 0

From: P'cola

Car: 1991 Z28 Camaro

Engine: L98

Transmission: 700R4 that will magically turn into a 6 speed one day.

I've got a stock "posi" outta my 91Z. Had about 150K miles on it when I took it out. The reason I changed is because I had a pinion gear go out and it welded the yoke to the end of the pinion, so it was no good. Let me know if you are interested.

Aug 7, 2005 | 09:42 AM

Yak

Junior Member

Joined: Aug 2003

Posts: 25

Likes: 0

From: St. Charles, IL

I have a NEW auburn posi for a three series carrier. It is for 28 spindle c clip axels. $250 plus shipping. I also have a set of used 3.42 gears if you want them for 25 plus shipping. I also have a set of LT1 axels (28 spindle i think) and an entire lt1 axel/carrier case. let me know if you need any of these things. feel free to email me at viniacobucci@yahoo.com

thanks vinny