I don't know what oil to use for my front and rear differential(s).
This is what is in the manual:
FRONT AXLE
² C205F - Mopart Gear Lubricant 75W-90
² 9 1/4 AA - Mopart Synthetic Gear Lubricant
75W-90
REAR AXLE
² 9 1/4 - Mopart Synthetic Gear Lubricant 75W-
140
² 10 1/2 AA - Mopart Synthetic Gear Lubricant
75W-90
² 11 1/2 AA - Mopart Synthetic Gear Lubricant
75W-90
NOTE: Trac-LokT differentials require Limited Slip
Additive in the lubricant. Trac-Rite™ differentials
DO NOT require Limited Slip Additive.

I don't have a clue.....
My Truck = 04 Dodge Ram 2500 CTD 2500 4x4 5.9L

Thanks again!

 

Do you have an equipment label in the glove box?

 

Not that I can see....I'm just going to go with a synthetic 75w-90 for both, I'm just checking fluid level and topping off if needed. Thanks!

 

If you do heavy towing, go with the 75W140.

 

In front and rear?

 

Yes. Try to get a build sheet for your truck that will tell you what axles you have. You really can't go to thick but you can go to thin.

 

Sorry. I vote for 75w90 in front and 75w140 in the rear. I also use royal purple synthetic. They say no additional Additive is required for posi rear end when using this product....and I havent.