Front and rear diff different viscosity

[Joba27n]

Not trying to thread jack but I guess another question that would be interesting to know is why spec two different oils. Especially when the viscosities are flipped and say a 80w-90 is called for the rear but 75w-140 for the front... I forgot which vehicle it was but I owned one that called for those viscosities.

 

[oilboy123]

Not trying to thread jack but I guess another question that would be interesting to know is why spec two different oils. Especially when the viscosities are flipped and say a 80w-90 is called for the rear but 75w-140 for the front... I forgot which vehicle it was but I owned one that called for those viscosities.

Yes that is strange?

 

[Snagglefoot]

You’re going to need the 75w140 for the rear. I don’t see why you feel you need to have the same product for the front. Just buy enough to do the job for each and chuck anything that is left if you don’t want to store it.

 

[CleanSump]

Are these the same manufacturers that have the " Lifetime " CVT fluid ?

Irrelevant.