H HaroldCallahan Joined Jan 6, 2005 Messages 45 Location Northern Colorado Nov 26, 2006 #1 Is there any additive necessary when using Mobil 1 75w90 in a 2005 GMC Yukon with locking differential ?
Is there any additive necessary when using Mobil 1 75w90 in a 2005 GMC Yukon with locking differential ?
A anti-chatter1 Joined Jun 1, 2006 Messages 30 Location Chicago, IL Nov 26, 2006 #2 NO the GMC uses a Eaton G80 Locking type of diff. No limited slip additive is needed.
M Mike_dup1 Joined Nov 17, 2002 Messages 3,023 Location USA-Michigan Nov 27, 2006 #3 Agree, no additve in GM truck G80. It can actually cause problems if you were to add it. Additives are only for use in Limited Slip Differential which are normanlly installed in GM cars, not trucks. I have Amsoil SVG 75W-90 in my 2004 GMC 4x4 Z71 PU and no additive. Its been working great for 3 yrs and 31,000 miles.
Agree, no additve in GM truck G80. It can actually cause problems if you were to add it. Additives are only for use in Limited Slip Differential which are normanlly installed in GM cars, not trucks. I have Amsoil SVG 75W-90 in my 2004 GMC 4x4 Z71 PU and no additive. Its been working great for 3 yrs and 31,000 miles.
