Without regard to power or drag, which would give the greatest service life of a differential?
I've been running through it in my head and can think of a bunch of pros and cons. But I figured I'd ask the oil nerds
2005 Chevy Tahoe, G80 rear diff. Factory suggests an 75w90. But these things also have a habit of breaking. And I plan to keep the vehicle for a long, long time.
Other thoughts: If a thicker fluid is appropriate, would it make sense to fill slightly higher than the factory level to account for the thicker film on the non-moving parts to keep the working level the same? This vehicle specs an amount below the fill hole, not dribbling out as most do, so it's easy to tweak how much fluid is is there.
I've been running through it in my head and can think of a bunch of pros and cons. But I figured I'd ask the oil nerds
2005 Chevy Tahoe, G80 rear diff. Factory suggests an 75w90. But these things also have a habit of breaking. And I plan to keep the vehicle for a long, long time.
Other thoughts: If a thicker fluid is appropriate, would it make sense to fill slightly higher than the factory level to account for the thicker film on the non-moving parts to keep the working level the same? This vehicle specs an amount below the fill hole, not dribbling out as most do, so it's easy to tweak how much fluid is is there.