Been telling my dealer for the past year that when I go down steep inclines that half the time I am free wheeling. They said there was nothing wrong but when I engaged the ADC on a steep hill last weekend there was a grinding noise from the front gearbox. I know that this is going to cost big bucks but anybody have any idea what this may be? I am hoping I can just replace a gear rather than the entire unit. It also looks like I may be replacing the drive belt too.