Product review (5 stars): Whirlpool Dryer Repair Kit
Our Whirlpool dryer model LEQ7030KQ0, for six months, squealed like a freight train coming to a stop. I found elsewhere online that the noise was likely caused by worn support wheels. I bought this kit from Amazon and with Prime I had it in a couple of days.

I followed the instructions included in the kit and installation was fairly easy; taking only a couple of basic tools and a little bit of time. Everything fit perfectly; belt, idler pulley, and support wheels. Dryer is now as quiet as new.

If I had known that it was so easy and inexpensive to fix, I would not have not put up with the noise for so long.