Got 2009 Dodge Ram QQTD 4x4 with AAM 9.5 up front & 11.5 rear differentials with stock covers, pretty sure oem is 75/90 GL5, no LS additive
It's time for a differential oil change and could use some info on which oil is best? I tow a 10k load about 3k miles a year....so which of these is best...