Just caught this on a Powerstroke bulletin maybe it will help....Good Luck
2005 Stall When Engaging Drive or Reverse, or at Stops, TorqShift Only:
Trucks built between 10-1 and 11-30-04 may exhibit a stall under the above conditions, along with various shift solenoid codes. This may be due to a sticking torque converter control solenoid. The transmission pan should be cleaned out, the TCC solenoid (3C3Z-7J136-BA) and external fluid filter replaced, and the cooler flushed and flow checked. TSB 05-12-1.
NOTE: These conditions may occur on vehicles outside of the build dates above. However, the same repair applies, although the solenoid part number may be different.