So my car has always been posi and left 2 dark tire makes when launching hard. The other day I notices it was just laying down rubber from my passenger tire. My friend seems to think this happened because I didnt add the posi additive when I changed the gear fluid last time and I'll be ok after I correct that. Any ideas???

 

I wouldn't be surprised. Throw the GM additive in and see what happens--you only have the cost of the bottle to lose.

JamesC

 

The purpose of the limited slip additive is to smooth out the engage/disengage of the clutches... Leaving it out isn't going to keep the clutches from grabbing, but it might make them wear faster. Adding the additive now isn't going to fix any damage that's been done, and it's not going to magically bring back the limited slip. Don't waste your time and money on additive at this point, start saving for a new carrier.

 

Just for the sake of more info. Any popping/jerking from the rear on a turn?

JamesC

 

are u sure you car isnt a 9bolt? no clutches just cones. they wear fast

 

it is a 9 bolt

 

e

then im sure your cones are bottomed I would take it easy on the rear until you can

A, buy new cones
B, machine your cones and shim the side gears
C, buy a working posi

right now your side gears are not putting any preload on the spider gears and the extra backlash will wear them out/ break fast


I helped write up a repair for these years ago it was a sticky

 

There may be info in the following link, TPI, that will be interesting.

https://www.thirdgen.org/forums/faq-...now-about.html

88, is there some disagreement on whether the 9-bolt limited slip requires the additive?

JamesC

 

yes, and to be honest ive changed my mind a few times i dont think its needed as of now. I figure its a clutchless posi so there should be no chatter

oh and that link u had shows mine with each page posted by me and duck

https://www.thirdgen.org/techbb2/sho...ighlight=9bolt

 

Most cone type differentials require at least one bottle of additive. The Auburn usually requires 2 bottles. Adding the additive now will not help at all with the OP. Yours is worn out and must be repaired.