Reply to thread

Message: [QUOTE="Mark Kovalsky, post: 1226044, member: 1654"] There are tables in the software that control when the torque converter locks and unlocks. They are pedal position vs. vehicle speed. They also get modified by other inputs, but they are minor. If you plot these tables I find they are easier to understand, so I called it a curve. The torque converter will unlock for different reasons. Below a certain engine RPM there isn't enough flow from the trans pump to keep the converter clutch fully applied, so it unlocks to prevent the clutch from slipping. Slipping will damage the clutch. This RPM is about 1300. It is also unlocked when more acceleration is requested, indicated by the driver pushing his/her right foot further down. Unlocking allows the engine to rev, often getting it to a better place on the torque curve, and unlocked the converter can provide some torque multiplication. These commands are controlled by the calibration. That's what I did at Ford, I developed calibrations. [/QUOTE]

Verification

Random media

Trips

turbofront

IMAG0208

ex_short_block

ebay_09_F-250_wht_grille

Duramax hauling grain truck

6_4gate_003

2011-04-19_15-37-24_781

KC68mm

IMAG0574

20140706_190146

Latest posts

Won’t start
- Latest: psduser1
- Yesterday at 11:33 AM
7.3 Tech & FAQ
GT37 Turbocharger w/10 blade turbine, billet comp.
- Latest: hskfab
- Friday at 1:24 PM
Engine and Drivetrain
Hard steer question/issue
- Latest: psduser1
- Jun 5, 2025
7.3 Tech
B
WTS/WIF light flash and stall issue
- Latest: blickcd
- Jun 5, 2025
6.0 Tech
T
2013+ steering gearbox in older trucks
- Latest: TPOLO
- Jun 4, 2025
Suspension, Drive Train, and Tires

Members online

No members online now.

Total: 163 (members: 0, guests: 163)

Top