Hi,
I have a 1999 Taurus that is having transmission problems. Here's some
background:
3.0 V6 engine. Runs great, and up until recently, shifted fine. After
driving home one day, we get in to leave and the car will not move in
any gear - as though it was in neutral. No noise - no grinding,
whining, etc. No leaks either. When I shift into reverse or drive, I
can feel the engine shudder slightly (like normal) as it engages, but
the car will not move. The transmission fluid level is correct and
slightly brown, but not burnt. No metal pieces are in it either - just
regular light wear dust. I checked the shift lever (Transmission Range
Sensor) on the transaxle and moved it by hand while my wife sat in the
drivers seat - same result. The engine will shift slightly as reverse
or drive gear(s) engage, but the car won't move even if revved up
pretty high. As an experiment, I unplugged a connector on the top of
the transaxle, near the TRS  (I think this is a 'bulkhead' connector?)
and then the car would drive forward but only sometimes in reverse. In
forward, it is very, very sluggish, as though it is starting in a high
gear. Still, no noises or leaks. So, I feel that the transmission is
mechanically OK and that an electrical device is possibly the cause of
our problem. I had the codes scanned at AZ and they came back the
torque converter circuit (PO743) and several different shift solenoid
codes (PO750, 760, 751, 756, 761, 755). I doubt all solenoids have
failed simultaneously, but I'm not sure how to isolate which ones are
bad. Any suggestions?
After doing some 'net research, I'm kinda leaning towards the TSS
(Turbine Speed Sensor). Any thoughts on this?
Also, if you have any other ideas or advice, it would all be greatly
appreciated. Thanks in advance.