Product review (5 stars): Whirlpool 4392067 Repair Kit
My dryer is a Whirlpool Duet WGD9200SQ1 and this kit worked perfectly. Our dryer started making noise a couple months ago and I opened the back and was able to reach in there and spray the pulley on the tension bracket with some WD40 and the noise went away but unfortunately it came back. Installing this new kit was pretty easy although my dryer was different in some ways from the Youtube videos dryer, it basically is the same process. Anyway I probably didn't need to replace the drum rollers or the belt, just the pulley on the tension bracket but it's very easy to replace everything and at only $22 for the kit, I figured I might as well. It was also nice to get in there with a vacuum cleaner and remove all the built up lint. The dryer sounds like new and I hope to get another couple years out of it.