recently bought a 2001 dakota, when peeking under this truck counted 12 bolts. i am assuming it is the 9.25. also in the glove box says 3.55 anti-slip and assuming that is a trac-lok. did not come with a owners manual but did find a repair manual online it says 75w90 is required.

from what i have seen on line the "MIL-L-2105C and API GL 5" mopar brand is synthetic. would this be correct and did a 2001 dakota come with synthetic gear oil?

does the mopar limited slip additive mix well with synthetic or would conventional be better option?

occasionally the truck might squat from home depot to home should i go with 75w140?

have never used synthetic for anything.

 

75w90 will likely be just fine for you, and the additive will mix in without issue. Just make sure you use enough.

 

agreed with above. I think it's 1 pint of friction modifier per gear oil change?