I have a Kenmore stackable washer/dryer. It is about 8 years old. The washer basket is leaning to one side and it spins slow and when you put in a large load you have to start the spin by pushing it by hand and it goes out of balance more than usual. I opened it up and there are three springs under the basket and none of them are broken, but I think one of them is weak. I am most concerned about what is causing the spin to be slow and weak to start?