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djgodden's avatar
djgodden
Explorer
Apr 28, 2016

Differential fluid thoughts/recommendations...

I'm getting ready to put a new larger differential cover onto my TV differential (2012 4x4 2500 Ram Laramie Longhorn w/6.7 Cummins). The standard fluid is 75W-90 for rear and ATF+4 for front. Should...
Tow Vehicles
STEVEO496's avatar
STEVEO496
Explorer
Apr 29, 2016
lawnspecialties wrote:
Is there any reason why switching to 75W-140 would not be advised versus 75W-90?

I'm not wondering if its necessary. Just if its not advisable.


75W-140 will hurt your fuel economy. At higher temps (towing heavy) the 75W-140 will offer more protection though.

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