Torque Converter Lock/Unlock

[cleatus12r]

The concern here is Ford. There are SO FREAKIN' MANY different strategies that do so many different things that it will make your head spin .

Here is a list of a few different things Ford did with their diesel trucks concerning shift strategies. Some were this way, others were not.

1. No lockup in 2nd gear no matter what accelerator input or road speed.
2. No lockup in 3rd gear until 45-50 MPH. Though by that time, it was in 4th gear under normal driving conditions anyway.
3. TCC unlock when accelerator pedal released. Relock when back into it.
4. TCC unlock with brake input. Relock when brake released.
5. TCC remain locked during either of the above conditions.
6. TCC unlock for 2.5-3 seconds during 4-3 downshift.
7. None of the above.

The shift/TCC strategy that gabeyd is referring to will apply the torque converter clutch on acceleration around 35-40 MPH. After that, it remains locked (or unlocks/relocks so fast that it's not perceived as an unlock/relock event) at any speed above 30 MPH...even on decel from 4th to 3rd at around 40 MPH. This strategy works well for most people and is essentially how PMT1 works right out of the gate. There are a lot of modifications that can be made to make it work even better.....but the base program is what makes the difference. However, I am pretty sure that PMT1 doesn't have the ability to run a glow plug control module like the Excursions have.

I want to say that DJ (soutthpaw) is running the EBM1 calibration in his Ex but Bill would know for sure.