Level

• The most common reason why a Kenmore washer shakes is that it's not level. Your washer comes with four leveling feet. These feet must equally hold 25 percent of the weight of the washer. If they don't, your washer will shake heavily during the spin cycle. Test the weight distribution by rocking the washer diagonally on both corners. If it moves even a little bit, the weight is not evenly distributed. If the floor is causing the unevenness, fix the flooring if it's unstable. Alternatively, place a 3/4-inch piece of plywood under the washing machine. Run the plywood under both the washer and dryer to keep them level. Tighten the feet if loose.
  
  

Support Pads

• Whirlpool makes certain Kenmore washer models. These washing machines have support pads. If these pads are worn, your washer can vibrate considerably. It can even cause your washer to virtually walk across the floor. Replace any pads that are extremely worn or cracked. Remove the washer from the power supply, and remove the console and the back panel. Take out the old pads by using a hammer to lightly tap out the mounting pins. Insert the new pads.
  
  

Clothing

• Your clothing can also cause your washer to become unbalanced. This causes excessive shaking during the spin cycle. Stop the washer by lifting the lid, and redistribute the load around the agitator. If your washer is overloaded, take out a few items of clothing. Close the washer lid, and restart the cycle. Your washer normally does vibrate a little during the spin cycle.
  
  

Additional Noises

• Rattling noises inside the tub usually indicate that you have foreign objects in the tub. Stop the washer, and remove any loose buttons, pins or change. See if any attached items are causing the noise. Cover up the items with rags or cloth to prevent these items from causing noise or scratching your tub. A thumping noise inside the washer is usually a normal sound. If the thumping is extremely loud, the washer load is unbalanced. If you are washing a small load, add more clothing. If you are washing a single bulky item, add smaller pieces to more evenly distribute the weight.