Something banging when spinning..

Lots Of things can cause this, here's my best bet:

Clutch

If the washer is making a loud noise in the spin cycle, the clutch assembly might be worn out. The clutch assembly makes the connection between the transmission and the inner tub. It is designed to allow the tub to get up to the proper spin speed gradually. As the clutch wears out it may become loud during spin or just after the spin cycle finishes. The clutch is not repairable, if it is loud or not working properly it will need to be replaced.

Drive Belt

If the washer is making a loud noise the drive belt might be defective. Over time the drive belt will dry out and start cracking, eventually a piece of the belt can break off resulting in a loud noise whenever the motor is running.