Posssibly the idle is too high. TAke the idle solonoid off of the throtle body and clean it.
I would check and see if you have a transmission or PCM problem.
Check TORQUE CONVERTER
Idle speed too high.
when u jerk it and u start
What kind of car is is? When it jerk while shutting off, do you turn the key off and it sits there chugging for a second before stopping?
Yes, because a jerk is a jerk, they would be likely to like another jerk!
Have your cat converter checked out.
It is most likely your HT leads or coil pack.
check for sticky brake calibers
Needs a new transmission. Same thing happened to my '05. Hope it's still got some kind of warranty. It's an expensive fix. $5,000+.
car will jerk forward and then go in reverse
well hmm i know what is if it does this ok when you start it does the motor race at all? or does it when you put it into dr or RV jerk into gear ??? my answer would be 1 of two things your idle is set to high or your linkage may be sticking so check that first thanks