I purchased the dryer repair kit that was specified for my Whirlpool Duet 27" dryer. The video on the website was extremely helpful, step by step pretty clear and concise.
While my dryer was not exactly the same as the one in the video the general technique was the same. Take the top lid off, disconnect a bunch of wires, take the front panels off remove the drum etc. I think the only difference was the top front panel and how it was removed. The technician's manual (located inside my dryer) was helpful with that along with a little close examination of the dryer itself.
I replaced all five wheels, associated clips and belt. The little triangle clips were a complete pain in the butt to remove/replace but with a little patience I managed to get them changed properly. The belt was pretty easy and following the video's exact directions went smoothly.
Use a pair of gloves! I didn't and one of my fingers took a good shot from my screwdriver, course no project is down without a little blood. :(
Once the machine was back together she started smoothly and made very little sound, just like new.
Total project time 2 hours start to finish including a good amount of time taking pictures as I went to ensure I didn't forget how it came apart. I really took my time and laid out all the parts in sequence as they came off. This could have taken less time but I was paranoid.
The shipping and online help from appliancepartspros.com was top notch, I will buy parts from them again and will use their online help to do my own repairs.
Thanks!
-Stephen