^It's not actually that common in auto's as its dearer (and harder) to incorporate, BUT it definately is a smart feature for regulating speed down hills.
If the car is jerking violently, then I suggest you have your transmission serviced. There will always be the initial hesitation, but if its violent then its not right. How long since the trans was serviced, and what colour is your trans fluid?
If the car is jerking violently, then I suggest you have your transmission serviced. There will always be the initial hesitation, but if its violent then its not right. How long since the trans was serviced, and what colour is your trans fluid?