What oil weight to use for Rear Gear???

[01LaserRedCobra]

Does anyone know what is the reccomended oil weight for the rear gear 8.8?
I have a 01 Cobra.

Thanks,

 

[Scrody96GT]

Does anyone know what is the reccomended oil weight for the rear gear 8.8?
I have a 01 Cobra.

Thanks,

According to my Haynes book, for a 8.8 Traction-Lok axle it's SAE 80W-90 GL-5 gear lubricant, plus 4 oz. of friction modifier. I'm not sure whether or not your Cobra has the same specs since it's IRS, but I'd think so.