2005 FX4 5.4L with approx. 190K miles, automatic transmission. Replaced the filter and shift solenoid and TCC (but not the "clip") and there was what seems to be a normal amount of metal powder on the magnet. Cleaned the pan and reinstalled.

Abrupt shifting started last week, but not all the time. Truck will be working fine and then at after coming to a stop I can feel the truck lunge forward while holding the brake when in "D" (when it is going to act up). If I keep in "D" and drive it kicks like a mule like it is going in and out of gear, but once I place in "1" and then shift to "D" and it does fine. Occasionally I feel a similar shudder in the higher gears, but primarily going from a complete stop.

I have read all that I can and can't figure out the issue, next stop is unfortunately a shop unless someone has any ideas.

 

Picking up a new bonded wiring harness and dropping the pan again for a better inspection this time. I assumed the solenoid was it so I just dropped and cleaned the pan, changed the shift solenoid and control solenoid and put it back together...

 

Not sure. 190K isn't bad.

There's a very nice guy by the name of Mark Kovalsky that can give some pointers, if he happens to stop by.

 

The next step is to get the codes read. The places that read codes free CANNOT read these codes. You need either a good independent shop or a Ford dealer.