Product review (5 stars): and updated with the metal inserts so it won't strip out like my original part did
Genuine Whirlpool part, and updated with the metal inserts so it won't strip out like my original part did.

IMPORTANT NOTE:
If the new coupler won't fully slide onto the shaft, lightly file THE INSIDE OF THE COUPLER, NOT THE MOTOR OR GEARBOX SHAFT. You'll need a small file to get into the coupler hole but that's the right way to do it. You always file the cheaper part to fit the more expensive part.