01GTCONVERTABLE

I don't see the point in deviating from the recommended weight. Ford built them, they would know better than Autozone or any of us. And I bought Mobil 1 fully synthetic, and it says directly on the bottle that friction modifier is NOT required.

lighswitch

Well I understand but I havent been told what the exact weight of the gear fluid I should be running. And some do contain the friction modifier, autozone didnt have mobil, or royal purple, redline.

01GTCONVERTABLE

my owners manual says 75w-140 full synthetic.

lighswitch

Really damn stupid auto zone didnt have any other than Lucus but i dont know if it was for small cars cause it has a big rig and like heavy duty formula. So i didnt get it.

01GTCONVERTABLE

Yeah, you have to remember that our GT rear ends are all 8.8. and that is the same as in Explorers...etc.

techsent

I read ya.

Ok, here's the specs...

--oil--

type = motorcraft SAE 80W90 premium rear axle lubricant (GL-5)
amount = 3.75 pints (for the 8.8 in axle)

--additive friction modifier--

type = ford spec c8az-19b546-a/est-m2c118-a
amount =One 4 oz bottle

The above came out of my 99 GT 4.6L manual. I then cross checked theinfo with the Haynes manual (ford mustang 1994 thru 2003) in case you have a different year car and it's the same.

Techsent

Tellowman24

i was abotu to do mine as well, doe anyone know what kind of bolt or screw holds the fill plug in? mine is liek sunken into the diff,

thansk for the help

lighswitch

I just finished mine 10 mins ago, and just use your socket wrench with out the socket and loosen it like that.