Polo-94Z28

Just picked up a project car (sig) whats the best way to get rid of the one wheel wonders. As I am having serious traction problems. I would Like to help on that a tad. Is it possible to make a 4th gen Z28 / T/A rear end fit? Is there any modification involved? Id rather not spend 2k on a moser or ford rearend.

Thanks

Laterz

Tobe2wild

The rear is the same as a 4th gen a 7.5 10 bolt. Im not sure what gears are in it but you can get this posi and buy a set of gears for around 250. This is a new takeout posi from a 4th gen.
http://www.slponline.com/view_produc...TNUMBER=64501T

irocznformula

best way that i found was to buy the $100 dollar stock posi from slp and put that in as long as you have decent gears like 3:23 or higher (i had 3:42 when i did it) you already have the 28 spline axles stock. just buy a stock posi and swap out the open wheelie peelie. thats what i did in my 91 rs that had a 305 tbi that i switched to a 350 carb. its held up great. hope this helps.

later,
Nick J

Jim85IROC

The zexel torsen take-off Diff from SLP is definately the most affordable way to go. A lot of people prefer this type of differential over a conventional clutch-type because it won't ever wear out, and is strong enough to put up with as much abuse as most people will give it. I installed it in my IROC, which meant that I had to upgrade to 28 spline axles. I bought a nice set of Moser axles, and my total cost still wound up being around the same as what an Eaton posi would have cost, and I wound up with a stronger rear end. I haven't driven the car much since I added the posi, but so far I'm very happy with it.

Ucantcme57

You were on the right track with the 4th gen rear. Get you a 4th gen rear something with a v-8 preferably a manual trans, gear ratios should be between 3.42 and 3.73 Great gears to run with a 700R-4 You will have 31 Splined axles which are stronger and you will have an extra 1.5 inch of backspacing for wider rear tires.. This is a direct bolt in installation no different than your stock piece, except for the e-brake, for that you will need GM Part # 10164125 for the e-brakes to work..

Polo-94Z28

Mmm... you guys have been very helpful. Thanks alot, I will look into the SLP differential. Right now the gears are 3.07, brandnew, way better than the 2.72 or whatever was in it.

Once again thanks

Jim85IROC

A 4th gen rear doesn't use 31 spline axles. It uses 28 spline axles, which is why the Zexel diff will work in our cars.

Striker27

Not to sound blunt but cant you just get a Power trax locker for that rear end?????

Black91Z28

where can u get a 4th gen rearend for fairly cheap?? I havent been able to find one on ebay

aklim

Auburn makes posis for this car in 26 or 28 spline axels.

Ucantcme57

I would Check the paper for people parting out cars, check the towing and or collision shops Junk yards.. I picked up my rear from a 30th aniversary Camaro, with a 3.42 Posi, Dual Piston PBR Aluminum Calipers, 11" Rotors.. I picked it up for $250.00 and it bolted right in.. I even got an adjustable PanHard bar off of it with the rear.. Some 4th gens had the adjustable bar..

Kevin