GESE2090 washer: horrible knocking @ spin cycle?

Recently, my washer (5yrsold) has started making a loud clunky, knocking noise during the entire spin cycle. It's not off-balance, and the size of the load does not make a difference....
We've also had trouble with it clicking (almost like an electrical short) and dimming the lights when it moves to the 6-minute agitation cycle......

Help? Newborns go through lots of laundry!! :)