Product review (3 stars): How to calm squeaky part...
I ordered this kit, and was appalled at the racket I heard.  Afterwhich, I decided to read reviews.  I'm not the only one who encountered this.

Cudo's to the seller, who was willing let me return the part.  I eventually decided to press-forward, since this was a genuine Whirlpool part.

The new part uses a pulley in place of the stationary guide found on original part.  The cords are shorter, too.

The problem is noise. Any slight vibration in the cords get amplified by reverberation of the springs.  Whirlpool has a quality control issue.  Only one of the two pulley assemblies was responsible for the racket.  I cured the noise by spraying lithium grease into the hub of the non-removable pulley.

Hope this install tip helps others.