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

 

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.

 

Doing more research, thanks for that idea.

 

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

 

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.

 

Yes, that will work.

 

Thanks for the advice, will place order tonight