80w-90 Alternatives ??

[bryce_am]

Rebuilding the differential clutch packs on my car, Ive noticed 80w-90 is impossible to come by in synthetic..

Can the diff be ran with a synthetic 75w-90 or 75w-140 ?

[justbob]

Ford changed their recommendations to 75-140 a decade ago.


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[gdmjoe]

justbob - Ford changed their recommendations to 75-140 a decade ago.
Circa 2007.

Motorcraft SAE 75W-140 Synthetic Rear Axle Lubricant ([i]Ford part name) ZC-32-A / WSB-M8B16-A2 (Ford part number / specification)
.

[MyBlackBeasts]

Ford changed their recommendations to 75-140 a decade ago.


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Ya! What Bob said. All you want is 75w-140 (unless you like re-doing bearings! :)