The motor only had 2 springs on it and both were next to each other rather than separated. They changed that around mid 80's (don't know why) and continued until it's death when Whirlpool bought them.Sounds odd that it will vibrate even on a cement floor. Are the leg nuts locked? Once you have it solid, lock the nuts on the legs up against the cabinet. I haven't installed a set of spring and glides on a motor wear out since 1989 and those were on 25-30 year old machines. Still have a set on the truck from then.