We have had 1 clutch fan,, Turbo's is a been a problem, they have a bad problem Cummins has with their Turbo's, I think is because the exhaust brake runs through it, but the exhaust brakes does help, here going on 170,000 miles with still original brakes at 50% still left,, one other problem is front wheels/tires being balanced with bad vibration around 70mph, so bad its knocked front bearings out twice, We finally got it fixed, went on the internet and found this place in Marrietta, Ga that will do any vehicle on the vehicle high speed balance where they true the tires, then the bacancer spins the tires up to 125mph on vechicle, they showed us before doing it on regular wheel balancer both front tires took about 14oz of weight, then put back on truck, and when they did the high speed balance, both tires they took off those weights and put onlt 2oz on each side, and they all vibrations went away, It was worth the drive to Ga and if anybody out there has a constant vibration on any size vehicle, this is the cure fo tire vibrations
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