Differential gear lube.
This may be like asking "which is the best brand of oil" but I need opinions. I'm due to change the differential gear lube in my 2005 Dodge 2500. Last time I used Mobil 1 synthetic 75W-90. I should...
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fj12ryder wrote:
Dodge recommends 75-140 for heavy duty towing. Can't imagine why one would want a less viscous lube. It's not like it is being pumped, it just cushions and lubes.
Old info. They did recommend 75w140 for heavy towing when they came from the factory with Dana axles (up to 2002). They spec 75w90 in anything newer than 2003, heavy towing or not, at least in my owners manual, and in this TSB: LINK
