Wheel bearing time? HMMMMMMMMM

[X5chemist]

I'm hearing a hum at 40 MPH+. I can't pin point it yet. Are the bearings ball type on X5s? With open diffs, I should be able to check for slack and noise. I have a mechanic stethoscope. I have two front FAG bearings sitting on a shelf. If it's a rear one, hubs and bearings will be replaced as a unit. Why fight extra work to save a hub.

The fronts seem to require removing the knuckle. I've seen two different ways to remove the rear assemblies. All four shafts are new. Corrosion has not set in so shafts should slide out easily.

What are y'alls short cuts? : The alignment is perfect. A cousin working at a BMW dealership did a great job. I would hate to mess with a new alignment if not necessary.