odd question
 

ok in all my cars ive ive only had on with a limited slip and only knew cause previous owner told me and showed me. but i had to replace fuel pump in my 91 caprice and notices a tag on rear end that said to use limited slip gear lube now ive asked a couple people and got different answers one says tags went on on posi and limited slip diffs nother says that since plain jane car that some on at factory just put it on anybody wanna give there $.02

chevy dealer sells a additive that you need to put in there.and if my memeroy serves me right limited slip was chevys posi in 91.i havent see a real posi unit in yrs and yrs.by gm

oh yea forgot, they dont just put tags on things because its fun.it dont matter if its plain jane or fancy nancy, if its there its there for a reason.

thanks for info at least if i ever wanna upgrade to a real motor i got a decent starting point on rear end so my tank will lay down those oh so nice dual black marks lol

You could try the old racer's trick, which I believe still works for the 91 Caprice... jack the rear axle up in the center until both wheels are off the ground, then spin one rear wheel. If the other wheel spins the same direction it is a limited slip or posi. If it spins the opposite direction it is an open rear end.

looked up rpo code and it came wirh 3.08 limited slip

here is the GM part number for the posi additive
#1052358 retails for $12.65

You can also use the Mopar part number for the appication
#4318060AB retails for $7.67

Any GM or Chrysler, Dodge dealer should have this stuff in stock.

Just add the bottle and top off with the appropriate weight gear lube

thanks chris
better use gm cause mopar stuff might fubar it lol

Sam it is all made by the same company :!: Just a different label :!: Heck Mopar fluid just might help it :idea: :idea: Oh my bad Sam isn't use to real power use GM only in the rear differential :!: :!:


Mark

I saw that coming.