COMPUSHIFT Mini Manual – COMPUSHIFT Mini Manual
Tuning and Driving
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3.4.7
Torque Converter Clutch Lock Delay
LK DLY
This parameter adjusts how long after a shift until the torque converter clutch will be allowed to lock.
After the transmission shifts into a gear where torque converter lock is permitted, a timer countdown begins. Once
the timer reaches zero, the clutch can lock, subject to the other parameter settings.
The main function of this parameter is to prevent a shift from being immediately followed by a torque converter
clutch lock. Depending on the vehicle, and especially the torque converter stall speed, this rapid sequence of shift
and lock events can be unpleasant.
3.5 Overdrive Parameters (Chrysler)
3.5.1 Introduction
The overdrive is engaged and disengaged based on the vehicle speed and throttle position.
At wide-open throttle, the system will 3-4 upshift at the wide-open throttle overdrive speed.
At closed throttle, the system will 4-3 downshift at the minimum overdrive speed.
For throttle positions between fully-closed and fully-open, the system calculates a proportional speed between the
minimum and wide-open throttle parameter settings.
The drawing below illustrates the relationship between throttle, speed, and the overdrive parameters:
3.5.2 Minimum Overdrive Speed
OD MIN
This parameter adjusts the minimum speed at which the overdrive will engage.
This is also the approximate speed at which a closed-throttle 4-3 downshift will occur.
3.5.3 Wide Open Throttle Overdrive Speed
OD WOT
This parameter adjusts the speed at which the 3-4 shift occurs when the throttle is at 100% or fully-open.