I was planning on changing my gears to 3.77, but why spend the money if i can get a fourth gen rear end with posi grip, 3.42 gears and disc brakes? Oh, do all fourth get z28's come with posi?

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Mods:Hooker Aerochamber 3" exhaust, gutted kitty,
March 2 piece underdrive pullies, smog pump gone,;these two made a very noticable difference.
14x4 K&N open air element filter-the best mod so far
Eibach springs with KYB's all around.
Appearance: Harwood cowl hood, Z-28 wing, painted black(7/20/00)-original color was light blue
*All these mods were made this year
Stock Options:117,000 miles on motor, 5spd, TBI, 305, T-tops
Run a best of 16.7 @85mph with traction problem. Have to try again sometime.

 

The 4th gen rear end is wider than the 3rd gen's. As for all of the suspension mounts; lower control arms and panhard, they are the same. Yes, I believe all of the 4th gen z's come with a limited slip differential.

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Neil 383 IROC-Z: TFS heads/JE pistons 10.8:1/ 24lb/hr SVO inj./ Edelbrock Runners&Base/ Strange 12Bolt Diff./ Neil's Home-Built BulletProof 700R4+Vigilante 2800 stall converter & much more.........

 

Yup, 4th gen axles are wider. I had one for about two weeks, then resold it because of the backspacing issues. I don't want to run fourth gen rims, nor do I want third gen rims to stick out on the back of my car.

Just get a 3rd gen 10-bolt, and rebuild it.

 

remember, a good amount of third gen's came with rear disc brakes and limited-slip diff's. My '89 Trans Am has both.