When I replaced mine I was skeptical it was causing the rock-tumbler noise coming from my snout. The stock coupler had a little play and I didn't believe it could be responsible for such noise. I was expecting giant egg-shaped holes when I first cracked it open.

I was quickly proven wrong.

The pins should be a slip fit (like .0001" clear) with basically zero movement. If you can see any daylight between your pin and the coupler hole, your coupler is shot.