Diff Fluid

[Calabrate2]

I'm about to change the rear diff fluid and have the factory limited slip that requires the special additive. My question, should I go with the valvoline that claims to be safe for an LSD or go with the mopar gear oil and separate additive.

[Burton58]

Whatever is cheaper. All it is is friction modifier. If the valvoline has it then go for it

[Calabrate2]

Perfect, wasn't sure if all friction modifier was considered equal

[Calabrate2]

Mopar wants 21 dollars a quart for 75/90. I couldnt help but laugh in the guys face.

[clean4drxj]

I bought the additive for the LSD and mixed if with regular diff fluid(whatever was onsale) worked like a charm.

[CumminsJeep]

Just cause it says limited slip on it doesnt mean that it has a lot of the friction modifier in it. I would still buy a bottle of friction modifier. and X2 on whatever is cheap.

[StompJrKz400]

They usually fail after 40,000 miles anyways so if you have a lot of miles on the differential just run normal gear lube, But also most GL5 rated gear lubes have friction modifiers in them already