Hi linno
I am sorry to hear about your problem. Did you check the transmission oil? I stranded with my car because the hose from the tranny to the cooler broke. The car started to smoke a lot (burnt transmission oil), the transmission started to slip, and finally the car did not move anymore. A new hose and a refill cured the problem. However the "jerking" moving of your car would not quite fit the problem. Regards, Bruno