Going to change out the rear diff fluid and install a Mag-Hytec. I know that Dodge does not required a limited slip modifier, but all I could find was Mobil 1 75W-90 "LS". Back of the container states "bla bla bla in both conventional and limited slip applications".

So two questions for the experts; does Mobil make the 75W-90 without the "LS" designation, or should I just use it without any worries. Don't want to put in the wrong stuff at $10 a quart. Thanks.

 

I have used this on my 06 and just bought more for the 10. I wondered the same and couldn't find a NON-LS Mobil Fluid. I looked here http://www.mobiloil.com/USA-English/...ubricants.aspx and said ok.


Hope this helps.

 

Thanks shonne. I visited the Mobil web site also, and found this statement; "For axles requiring the highest level of limited-slip performance, OEM specific LS additives can be added to this fluid." I interpret this as; if your OE requires modifiers, then you still need to add the OE modifiers. Maybe the 'new' LS is a sales statement for limited slip equipped trucks (which are almost impossible to find).

 

If you have an LS diff, and dont add the modifiers, it will make some racket around corners. We buy some stuff from Ford, small bottle, dark green liquid that stinks like crazy that we add to the LSD diffs. The oil is rated for conventional and LSD, but wont have the additive unless it states it.

 

You are good. These AAM axles don't need any modifiers. You can add it if you like but it is not needed. Mobile 1 75w90 Synthetic is what most folks use. This is the same axle that has been used in 03' to current 2500 and 3500 trucks.