FCar2000TA

iTrader: (7)

I'm about to change out all of my fluids, and the rearend oil is the only one that I'm not sure on. I have a Dana 60 with TrueTrac and 4.10s. The car almost never sees any temperature below 50, but will see up to 120 degrees during the summer.

I know that I don't need Limited Slip additive, but what weight should I run? I am thinking 85W140 since it is a big rearend and spends most of the year above 80 degrees. Or, would 85W90 be a better choice?

Bspeck82

Get some 80w90 Valvoline at a local parts store or Walmart. It's cheap and works well. You run what they tell you to run from the manufacturer. They tell you for a reason. When they shipped me my carrier with the truetrac it even had a tag that says run 80w90 non synthetic gl5.

FCar2000TA

iTrader: (7)

Good point. I will ask Strange.

FCar2000TA

iTrader: (7)

Got this back from Strange "We use 85 140 non-synthetic gear lube, the True Trac does not need any friction modifier. "

Bspeck82

Mhm. If your local store doesnt have that weight than 80w90 will work just fine. Make sure it's a dino oil with no friction modifier.

BOLO

iTrader: (40)

Lucas 85w140 is what comes with their S60 when purchased new.

01ssreda4

iTrader: (96)

I run redline shockproof in mine.

FCar2000TA

iTrader: (7)

Strange said that they run Lucas.

Darth_V8r

iTrader: (4)

I run amsoil 75-90 and I live in mesa just outside Phoenix.

MidwestChassis

iTrader: (5)

For warranty reasons i would run what Strange recommends.

01ssreda4

iTrader: (96)

They chemically test oil during warranty claims? Asking for a friend.