Two docs in my archive-

 

So to be clear, you didn’t install any shims from the kit?

 

Just clutches

 

You will notice in the JRE tear down there are just 2 carbon clutches and 2 steels on each side of the of the stock posi. JRE makes it 3 and 3. The other, all surfaces are friction and they are 7 in total. Hell, even adding the preload spring to a stock posi would be an improvement.
Too often people try and go way too far. Too big a cam, too loose a converter thinking the ultimate is what they want for the street. The shop “thought“ using shims would make the posi better, but it just locked it up and made unstreetable.
Learned a long time ago that biggest is rarely best for street. The spring is just to add preload.
the ultimate pressure on the clutches is from the angle of axle and side gears. As load is put on the gears the axle gears get pushed out loading the clutches. That keeps the both tire turning the same speed.
In the spring I will be doing this for the second time. First posi stayed the Dead Red, my first GT.

 

Hey Drew, thanks again for all your help. They pulled some shims and it works perfectly now.
Cheers, Steve

 

Glad to hear it, Steve. It’s one area that there is no room for overkill.

 

Does anyone know by chance if that same kit from gbodyparts works in the zl1 3.23 diff as well? I burnt mine up and am having a hard time sourcing parts for it... I contacted my local dealer and they gave me a part number of 92230606, which gbodyparts sells a replacement for, but not sure if I trust the dealerships part number.

Thanks!

 

ZL1 not listed. Contact AAM, the diff manufacturer. Or Westcoast differntials.

 

Thanks for the reply!!! I ended up getting ahold of Adam Cooper, he sells worm gear posi's for them. I'm going to ship it to him and have him go thru the entire thing for me.

 

I have an Eaton TrueTrac in mine, it's so much better as it basically locks up instantly. Prior to it, my backend would fish tail a bit initially on burnouts. The Eaton nearly eliminated that. I also have a line lock, so the burnouts were pretty consistent with both.