VEHICLE: 2012 WK2 Overland with limited slip rear axle.
I want to changeout all the drivetrain fluids (axles, transfer case, trans) to synthetic but I have a small problem or question. On the rear axle I had planned to change the gear oil and add friction modifier as required of a limited slip axle. When I went to the dealer to get the Mopar #68083381AA I found out that rather than purchasing 4 oz. of friction modifier, I was buying a whole quart with the modifier in it. It is a different part number than the standard gear oil. Thus, I can't change to a syn gear oil in the rear axle. I was told that Mopar used to sell the modifier seperately. Does anyone know what modifier is available that would meet OEM specs and allow me to change out to a syn gear oil in this axle? Or am I stuck with the Mopar oil due to warranty concerns? Thx-
I never understood why these electronically controlled differentials still needed the friction modifiers. I hated that whole mess with the mechanically engaged differentials. I thought the whole point of an electronic diff was to do away with that mess.
Adding an abrasive to synthetic oil, yeah that makes a whole lot of sense.
If it does need friction modifiers, change the oil often and skip the synthetic. It turns to mud.
My old Audi had 2 manual electronic locking diffs and I don't think it needed friction modifiers.
I never understood why these electronically controlled differentials still needed the friction modifiers. I hated that whole mess with the mechanically engaged differentials. I thought the whole point of an electronic diff was to do away with that mess.
Adding an abrasive to synthetic oil, yeah that makes a whole lot of sense.
If it does need friction modifiers, change the oil often and skip the synthetic. It turns to mud.
My old Audi had 2 manual electronic locking diffs and I don't think it needed friction modifiers.
Another question relating to synthetics in the rear axle of my Quadra Drive WK2: Is the 4 oz. Mopar friction modifier (04318060AB) the same thing that is in their 1 qt product with the modifier already in the gear oil(#68083381AA)? I was told by the parts guy that he wouldn't "risk" it because of the aluminum construction of my diff. He implied that the 4 oz. friction modifier additive was for the iron rear ends. In a nutshell, I want to add the 4 oz. to synthetic gear oil but I don't want to risk doing something when I'm not sure about what the effect might be. Any Mopar mechanics out there?
FYI, the Amsoil reference chart refers to the 1 qt. product in the rear end with no mention of the 4 oz. friction modifier.
I thought Chrysler went to 75/140 synthetic is all the rear ends a few years back. I know that was the fill if you had the factory tow package. Also what came in the 5.7 LX rear ends.
The Mopar 75/140 gear lube is synthetic.
I spoke with someone at Amsoil today concerning the issue of friction modifiers in the ELSD rear axle of my WK2. He told me that their Extreme Gear 75W-90 gear oil DOES NOT need the friction modifier because it is already in the product. He also stated that this preoduct exceeds OEM specs and will not void any warranty. I'll give this a try.