M mikestertwo Well-Known Member Joined Sep 13, 2006 Jan 9, 2012 #2 Use the GM gear lube along with the additive.
P PSU 98 Member Joined Apr 25, 2011 Jan 9, 2012 #3 I plan on using Royal Purple 75W90, no additive needed.
G ghall Active Member Joined May 24, 2001 Jan 10, 2012 #4 PSU 98 said: I plan on using Royal Purple 75W90, no additive needed. Click to expand... That is what i used!
PSU 98 said: I plan on using Royal Purple 75W90, no additive needed. Click to expand... That is what i used!
