Rear Axle Parts Diagram

Anyone had an issue with a bad bearing causing the rear drums to go out of round?

 

Jesus Christ, so many people don't ask the right questions around here and just throw parts at things without no due diligence.

But first, thanks for at least jacking it up and doing some troubleshooting. Your wheel bearings aren't bad, it's not something that typically wears out\goes bad on these trucks\axles. If you had a wheel bearing problem, you'd know it immediately after jacking it up and spinning the tires.

Keep troubleshooting, this is probably a non-issue situation and you are hearing something normal (tacomaworld people like to complain about 'diff whine', but 99% of the time it's normal and a zero burger).