I have a Kenmore HD washer model number 110.91121100 that is shaking when in the spin cycle.  I have leveled the washer and have rearranged the clothes multiple times to no effect.  When I observed the wash tub during the spin cycle it was shaking violently.  What I need to know is this a common problem and if so is it an easy fix.  Or is the washer on it's way out.
I believe this washer is 20 years old. Not sure though.
Thanks
				
			I believe this washer is 20 years old. Not sure though.
Thanks
 
	 
	 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		
 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		