I received an email that warned me not to use my cruise control in heavy rain or on really slick roads. This email claimed that if I started hydroplaning the cruise control would make my wheels spin FASTER and cause me to lose control. This doesn't make any sense at all to me, but I am no expert on cruise control. Before I call total bullshit on this I wanted to ask the experts. Is there any way that cruise control could cause my wheels to spin faster if I started hydroplaning? Or is there any other reason that I shouldn't use cruise control in heavy rain.

 

You'd think that the cruise would hold the wheel's speed constant...

But as soon as you start hydroplaning, the car slows down because of all the extra drag of the water. Then the cruise holds the wheel speed where it thinks it should be, which is faster than the car is NOW moving...

When you start hydroplaning you want to lift a little, to shift more force to your front wheels, even as the car is actually slowing down. Lift too much & it's like putting on the brakes, not good either. Cruise control is too stupid to know what's going on, & too slow to react.