i have a 2001 dakota 3.9 auto 4.1 rear trac-lok. the fan clutch started making noise at high RPM only, it got loud, so i took it to the shop. 1.5 hr and $155.xx latter all was right with the world. the new clutch seems to spin the fan more. next week a new starter and battery, old one has been in the truck for 4 years. i dont have a garage to take care of a cold morning no start, so i trade out starter and battery every 4 years. hasnt failed yet.