I have ask two dealers and they don't Know so what is it and how does it work. In 00 or 01 Polaris had an ATV that had Visco-Lok it was called the Rock MT king so is it anther ATV with Visco-Lok or what.

 

Active Decent control is Polaris' 4 wheel ABS

 

My take is that the front hilliard will engage if the front wheels turn faster than the rear going downhill, the opposite of 4wd operation going forward where the rear tires turning faster than the front engages the front wheels....

 

You might want to look at the topic "What is...ADC(Active Descent Control)" posted middle of August 2006 ----last post september 9, 2006