The symptoms described seems to indicate a fault with the transmission.
The jerk is most probably caused by the trans. Does the D4 light blink while driving?
Does the jerk occur each time while taking off?
Does it happen only when engine is cold or at operating temperature?
Does it happen with hard acceleration?
I am not sure if the assumption of a trans fault is correct as the info provided is not too clear. If you have any other info that you think might help, please let me know.
Thursday, September 17th, 2009 AT 8:49 AM