After watching the repair videos I took the top and front off my dryer and found out that I needed a new dryer drum front support bearing, new bearing slides, and a new trap duct assembly. I ordered a felt trap duct too, but didn't realize one comes on the trap duct assembly, so I didn't need to order it separately. I took the old pieces off and put the new ones on with a little work and adjusting so they fit right. Everything went back together fairly smoothly with everything working better and no more dark streaks on the clothes.