When our first one started clunking, it turned out to be the motor shaft had sheared off. It was six years old, with a five-year warranty. We were very lucky that it broke after it was off the ball. It mysteriously had started making a strange noise at the beginning of the season, and it died after four up and down cycles.
Every day's a learning experience, though sometimes not what we expected.
2012 Jay Flight 19RD
2016 Ford F150 XLT 2X4 SC 3.5L Eco Max Tow
2010 Tundra TRD DBL Cab (Traded)
2 new fluffy Corgis, Bayley and Stanley