Where to buy 2008 differential cover?

[Kleetus]

Now I'm gonna have to check, because I thought I saw mobil 1 75/140...

Problem with the polycarbonate cover is it will transfer about 1/10 of what the steel cover would. You're really gonna cook the oil then. Plastic generally as a rule is a horrible conductor of heat. That's why it's such a ***** to machine.

 

[Fine69]

Walmart only sells 80W90.

I am assuming that 18,000 miles is enough time to break in things (diff, engine, etc.) and I want to switch over to synthetics for a long healthy life.

Is Royal Purple gear oil really purple in color?

Yes, it is.

 

[BamaSixGun]

I got lucky on the rear diff. fluid when I had my '08 cover installed.

Yes, I had someone do it for me, no time to do it myself.
So my buddy that works at the Ford dealer put it on for me (20.00),
plus he had plenty of new 75W140 oil left over from other jobs and didn't charge me for it.

 

[no-red 6 0]

YES, but you are always so _ _ _ _ lucky....

 

[tony4380]

just on a side note... a finned surfacen usually at least triples the surface area of the piece

 

[NASCAR Mike]

Do you need the friction modifier even though synthetic oil is slippery as all heck?

 

[Kleetus]

In theory yes, it's not that synthetic is so much more "slick" it just doesn't break down until much higher temperatures.

But that said, I still wouldn't put that additive garbage in there. Unless it chatters when you put the new fluid in, and it bugs you, I'd leave it out, and I plan to do just that when I change my cover.

 

[Crumm]

Do you need the friction modifier even though synthetic oil is slippery as all heck?

Yeper

 

[bushpilot]

Do you need the friction modifier even though synthetic oil is slippery as all heck?

if you use the royal purple lube its already mixed in.

 

[GO BIG]

Has anybody heard of:
BG Ultra-Guard™ Heavy Duty
BG Ultra-Guard™ Heavy Duty is a synthetic (Polyalphaolefin) A.P.I. GL-5 rated gear oil blended to SAE 75W-140 viscosity. It may be used in all conventional and limited slip differentials. (Note: Limited slip differentials require the addition of BG LSII, PN 328). As a heavy duty gear oil it provides the following superior benefits:
• Thermal stability
• Reduced maintenance
• Optimum drive line efficiency
• Long drain life
• Quieter operation
• Protection against wear, pitting and corrosion
• Clean components and extended component life
• Seal compatibility and improved seal performance.
Part No. 752 32 oz. (946 mL) bottle

My good friends dad works for the company and I am sure I could get some to "trial." Just dont want to be putting junk in the truck

BG Company