Leaks a small amount of water on the floor every now and then. Not every cycle though and not much water, maybe two cups or so. I have checked the back end and found no indication of any issues there. The washer is a Sears Kenmore and is about 8 years old. Last week it vibrated horribly when a load of blue jeans got out of balance. After that is when we first noticed signs of water. What could it be and where do I start first?