On RDU failure. It looks like the pinion bearings are failing due to fluid break-down due
to excessive heat. It is tough to figure out if they do light weight fluids for EPA crap.
Bearing clearance on rotating parts has not changed. Clutch pack clearances are the same.
Hence, the tighter clearances B.S. that is fed to us, is not a starter nor valid!
Before the recent push to maximize fuel economy, lower emissions especially CO2, a heavier
weight differential fluid ie. 75-140 etc. was called for for heavy duty service or towing.
Remember, Domestic manufactures sell new vehicles. The faster your new pride and joy wears
out, the faster the bastards can sell you a new one.
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