Quote:

---

Quote:

---

Make sure you use the HYPOID rated oil too. It includes friction modifiers.

---

Not true. "Hypoid" refers to the cut of the gears. A "hypoid" lube (like GL-5) has specific extreme pressure additives, meant for ring & pinions--nothing to do with limited slips.
A friction modifier is required for the limited slips, and some lubes have them in it, some do not.

---

Thats exactly right. A lot of companies say compatible with limited slip differentials. That does not mean the additive is in it. I buy all mine direct from the ford dealer parts department. Very good prices.