POSI lube
 

So what are you guys using now in your posi units in place of the GM additive.

Re: POSI lube
 

last one I did, I was told to run 2 bottles of the stuff GM sells today, guy said it was to dilluted for the original clutch packs of '67. dunno? it was acting weird with one bottle added the second and she settled down. https://www.yenko.net/ubbthreads/imag...ins/3gears.gif

Re: POSI lube
 

I always used the GM stuff but this time I purchased the REDLINE Synthetic from Summit with the posi additive. The clutches are much quiter now when I pull off the highway and make the first turn. I think the new stuff has a better "cling".

Re: POSI lube
 

Slip-Lock™ Differential Additive (ADA)
Formulated with advanced friction modifier. Designed to eliminate gear-housing chatter in cars, trucks and SUVs equipped with limited-slip, posi-traction and locking differentials. Formulated for use with both synthetic and petroleum gear lubricants and safely replaces manufacturer-recommended friction modifiers.

http://www.amsoil.com/redirect.cgi?z...storefront/ada