Is AP2906586 (63753) agitator interchangeable with agitator on model number LSB6200KQ1 Whirlpool washer.
No the agitator from the model LSB6200KQ1 will not work in place of the 63753 as they are 2 different designs. If you need the agitator for the LSB6200KQ1 then the part number is 3363003.
How does the upper agitator secure to the lower agitator?
Answer Hello Boog. The 2 parts just snap together. If yours does not, you will need to order part number 387838.