Product review (5 stars): Fixed my problem
I have a Roper gas dryer that had started squealing, and after reading some of the reviews, I was almost hesitant to order the kit. However, I took a chance because I figured that for the price, even if I couldn't use all of the parts, I'd still be ahead. I am happy to report that, if you follow the easy directions that are included, the whole job can be accomplished in a half an hour. The parts were identical to the parts in my dryer except for the tension wheel, which in my opinion, is superior to the original wheelless part. I made sure that I lubricated the roller shafts and tension wheel shaft with 3-in-one oil, which I have read is highly recommended during servicing. So far, so good! If any problems develop later on, I'll be sure to update this review.

PS I discovered that some people are selling this exact same kit (4392065) online for 30 to 60 dollars.