ScottG wrote:
I think any of those oils will serve you well but when it comes to the cover, HERE is a screaming deal on the exact part Dodge and AAM use on the latest HO Cummins equipped differentials. It was designed by the manufacturer of the diff to lower temps and not so much just to be pretty.
it's $400 at the dealer but this guy sell them for a great price (I bought one).
Nice cover at nice price, but I don't think it has drain plug or any extra added capacity. PML's are not that much more and have fill, inspection and drain fittings. Also add .75 qt capacity.
The AAM would be great for those not towing and not needing to change fluid very often, if ever.