Just got a used limited slip 8.8 rear end in my 94 2wd xl. What is the best way to test the condition of the LS clutches? read somewhere to jack up one wheel and put torque wrench on lug nut. Should be over 50 ft/lbs to turn wheel. If clutches are worn out will I do any damage by driving or will it just act like my old open carrier diff? Was gonna put 80/90 plus additive in it? Does anyone run 75/140? Is this better if you hear LS chatter in tight turns?

 

you should hear no chatter... if you do you need the LS additive....

 

I test mine by finding mixed traction scenarios, and punching it. Then again I have a clutchless lsd. Mine lights up the pavement tire, it's wild

 

I just look at the tire tracks, dump the clutch on some loose gravel and I can see that its works

 

Theoretically the gravel puts the same resistance in both tires, so a weak lsd or open diff might look similar

 

Well I can spin the truck around too and see both tires kicking dirt.

I have no idea if its working at its full potential, but when i do get it up on a hoist every once in a while I can see it functioning. Me and a friend tried to spin the tires by hand and couldn't unlock them, so by my standards it works for me.

And I know thats not the right procedure lol

 

so you have an aftermarket carrier... the Auburn Cone style arent as strong as the factory clutch style....

you do a burn out and stick the tire hard enough it snaps the cone....


just power brake the thing on pavement.... that will tell you.

My rear end is open but punching it on gravel or dirt is spins both tires... even on wet surfaces I can spin both for a second then it kicks to one

 

I have a detroit truetrac. I'm not familiar with the auburn cone, but rest assured i'm also not an idiot.. I dont push it hard, just enough to test it.

 

the detroits are pretty good and tuff... unless you do something very stupid you cant hurt them....

 

true that.
I have noticed that some of the gear oil comes with the additive included.

either of those weights should be fine so long as you have the additive.