I've been looking thru the forums and have found partial similar situations but not sure if any apply. My mom has a 2002 Ford Taurus V6 DOHC that recently started lurching forward when beginning from a stop. This last for a few seconds and then the car seems to accelerate correctly. At times between 2000 and 3000 rpms the tach will rev but you can tell the car doesn't seem to be in gear, when the tach comes down it will again "grab" and move forward. I've changed the air filters and transmission fluid recently, a check last night confirmed fluid level is still fine. When this began and she took it to the shop it had thrown a engine code indicating a camshaft synchronizer, the shop just printed off a webpage about what the code was and told her the transmission was likely dead. It has not thrown that code again and it doesn't make the chirping I read about in every other post about that item. What could be the issue? Is it the synchronzier?