PCM Code

[cleatus12r]

The most ridiculous thing about Ford programming is their TCC apply strategies. The 95-97 guys really have it bad because the torque converter clutch apply system consists of an on/off solenoid and valve and a ridiculously long delay between the 3-4 shift. It basically goes from 3rd lock to 4th unlock and back to relocking the torque converter clutch. It does this in a 1.5-2 second window so us guys get a really long, drawn-out shift (seemingly).

The PMT1 strategy that you have in your Super Duty does the same thing...but over a much shorter time. The torque converter clutch is commanded off during the 3-4 shift but it is over a much shorter time and then the fluid pressure is ramped back up (instead of just being turned on) over a time of a few milliseconds. This gives the feel that there really isn't a loss of TCC apply but it IS there.


Without feeling the shifts or being able to scan data during the shifts, it's hard to know what is actually going on. I'm going to say that your torque converter system is likely a bit more responsive than most to fluid pressure changes. Unfortunately, I cannot say for sure.