855speed

Finally working on 85 L69 Iroc (MT), rear axle is 3.73 non-posi. This thing 1 wheel peels in my driveway, and since I am rebuilding the car want to do something about the rear end. It has Drum brakes, but am not too concerned as I am not drag racing, just normal and spirited driving.

What should I do with it? Rebuild with a posi? Get a used axle with Posi(found one locally but it maybe a 273 ratio posi)? Bite the bullet and get another axle like this:

http://www.hawksmotorsports.com/hawk...-end-assembly/

Don't want to spend 2k. Any suggestions appreciated.

Also found this kit, would have to find shop to install:

http://www.quickperformance.com/GM-7...e_p_20410.html

big gear head

The Yukon Dura Grip from Quick Performance is a good differential and a good price. You will need a set of bearings and shims to install it. QP can supply them too.

855speed

Doing more research, thanks for that idea.

big gear head

Read this while you are at it. http://www.nastyz28.com/forum/showth...t=install+posi
Works the same for the 7.5.

855speed

Was looking at these 2 parts kits. Would this be sufficient? (I think so)

http://www.quickperformance.com/ZK-G...l_p_17362.html

http://www.quickperformance.com/GM-7...e_p_20410.html

Checked the backlash on 3 separate occasions, .008 is my reading all 3 times.

big gear head

Yes, that will work.

855speed

Thanks for the advice, will place order tonight