unfortunately its auto...Ive tried slowing down to the speed limit...but I currently need to fix my speedometer cable since its not actually hooked up so im going off engine RPM and GPS signal for speed...currently it has the stock 2.73 rear ratio I believe...or what ever stock is. I do try and keep a constant speed of 65 but at times i do creep to 70..i just gotta keep more alert...and of course there are those times when i like to do spirited driving