If you don't replace bad wheel bearings they will seize up and break your drive axle. It would be cheaper to replace them as soon as possible.
No, bad front wheel bearings would not prevent a transmission from shifting. If your car has bad front wheel bearings you will notice wheel noise or wheel looseness.
the wheels spin slower than usuall, or they dont spin very smoothly
you hear a sound from the wheel
Bad bearings or bad piston rings
No
worn or bad wheel bearings will make noise (grinding, humming, etc)
About $500 to replace. They keep your wheel on. If your wheel bearings break off your wheel falls off.
Bad wheel bearings
bad wheel bearings, or bad seal.
You possibly have warped brake rotors on the front. Or Bad Wheel Bearings.
The same as they are on any car - bearings that have begun to develop play or roughness.
It's posible, but not hugely likely.