I replaced the tumbler bearings that support the front of the drum, replaced the rollers that support the rear of the drum, and replaced the axles with retaining clips that support those rollers. While working in there, I also replaced the belt. I initially did not replace the roller support axles and clips (just the rollers), nor did I replace the belt. Failing to replace all those parts was an error. I had to go back in and replace those parts. Notes: 1) I highly recommend the use of retaining clip pliers and labeled zipper-closure plastic bags for the various types of screws you will encounter. 2) You do not need to disassemble the lint trap and blower shield to remove the drum front assembly, but if you do, you will be rewarded with coins, combs, etc.