cruise control over acceleration

[Mrnice2all]

Why does the engine over rev when on cruise control?It always does this,especially when towing my atvs and going up a hill.Is this normal even when the set speed drops only a few mph?

[T-sak12m]

It's typically not good to put your truck in cruise control while towing and going up hills! Do you have the V8 or V6?

[Mr. Creosote]

In control system theory this is called slightly underdamped operation or "overshoot". Essentially the cruise control designer wanted to have the system reach the set speed quickly enough. The harder it tries to do this, the greater the propensity towards overshoot. I would wager when they were tuning the system, they initially set it so it did not overshoot the speed at all, but found it took too long to reach the speed set points this way, so they cranked it up and just decided we could all live with the overshoot.

[integraGSR]

sucks, i hate it too. i just turn it off when i come up to a hill and do it manually. don't know why you would cruise when towing something though, unless it's really flat roads.