ive been wondering why my car wasent posi, i thought it was but the posi unit was bad in it but i got under the car yesterday and pulled the rusty tag off the rear end i know the tag on the posi rear's say use limited slip gear oil only but mine said "Spin Resistant Diff" and "use approved gear lube" or somthing like that, so i take it its not posi besides that its only a 9 bolt rearend, is it rare for an Iroc to not have posi? is the non posi rear part of any kind of special handeling package or anything? just wondering thanks -Don

 

i have an 86 Iroc-z and mine isn't posie either. I think posie was an option...een for the Iroc. Just depends on how it was ordered.

 

That is a posi, limited slip, spin resistant, what ever you want to call it. Yours is probably worn out, that's all.

Also, the 9 bolt is much stronger than the 10 bolt rear.

Miles
www.9bolt.com

 

my friend got a 3.27 posi for is 91 RS and the tag on his rear said "limited slip Diff" and "use limited slip gear lube only" are you sure my car is posi??

 

yes, is posi, differnet names ofr same thing, also are No-Spin, Maximum Traction, POWR-LOK, etc etc, all kinds of names for it,