Carl H Mesa , AZ December 31, 2018 Gear box making a thump noise Replaced the stationary gear and the agitator gear, shaft, bushing, oring, and repacked the grease. Works good now. Stationary gear was the most difficult due to the tight fit. Start it straight and work it in slowly(small movement on each side. Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours