T tufftrux Joined Nov 27, 2004 Messages 3 Location NYC Dec 7, 2004 #1 I have a 2002 GMC WT5500 (ISUZU FRR) truck with a 6 speed manual transmission. The owner's manual says use SAE 90 GL-5 manual transmission fluid. I only have Amsoil synthetic SAE 80W90 GL-5 gear lube. Is this lube compatible? Thanks, Luke
I have a 2002 GMC WT5500 (ISUZU FRR) truck with a 6 speed manual transmission. The owner's manual says use SAE 90 GL-5 manual transmission fluid. I only have Amsoil synthetic SAE 80W90 GL-5 gear lube. Is this lube compatible? Thanks, Luke
JHZR2 Staff member Joined Dec 14, 2002 Messages 56,216 Location New Jersey Dec 7, 2004 #2 GL-5 is the important part. It ought to be smoother when its real cold, the rest of the time itll warm up to a 90 wt pretty quick. JMH
GL-5 is the important part. It ought to be smoother when its real cold, the rest of the time itll warm up to a 90 wt pretty quick. JMH
