My machine is extremely loud when it spins. what do I need to do

Make sure the feet are all securely touching the floor. Failure to have the machine level and all feet touching will lead to wobbling during the spin cycle. Also, be mindful of balancing the load so that for instance you don't have all jeans on one side of the tub. This will cause the machine to wobble excessively.

I would guess you need to level it. Most washers and dryers have some sort of self leveling in their feet but some do not. Attempt to lift the rear of the machine up two to four inches and then set it back down. Check to see if it wobbles. If is still wobbles you may need to adjust the foot using an open ended wrench.