Yes. All four wheels need to be balanced.
If wheels aren't balanced they'll vibrate when they're rotating at speed. This can be unpleasant and can even increase wear on tires and suspension.
I'd first check the balance of the rear wheels at a local tire shop. The one with the computer balancer. If the wheels are okay, then the rear axle bearings might be worth a check. The rear wheels also might need aligning though that's a tire issue. Not often, the wheel itself may be defective or the tire.
It could be from a worn out U-Joint on the drive shaft or it could be one or both of the rear wheels are out of balance.
it keeps it's balance straight
If the front wheels are on a tow dolly, the rear shaft will need disconnected.If the front wheels are on a tow dolly, the rear shaft will need disconnected.
yes, you might need to get a new rear wheel deck adjusting system. make sure it's for large rear wheels
It is what the rear wheels bolt to.It is what the rear wheels bolt to.
Yes, If the car is rear wheel drive you have to have the rear wheels on the dollie. Front wheel drive you need the front wheels on the dollie
Only if your towing the vehicle by the rear wheels. If you are towing by the front wheels you do not need to unlock the steering wheel.
You don't need to, but it's a good idea. You will get a smoother ride.
Otherwise it would fall over and you wouldn't be able to push it. -_-
it can if it is a manual transmission and is left in neutral. if it is an automatic you need to know if it is front or rear wheel drive. If its front wheel drive you need to lift the front wheels off the ground and if its rear wheel drive you have to lift the rear wheels off the ground.