COMPUSHIFT Mini Manual – COMPUSHIFT Mini Manual
Tuning and Driving
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3.4.3 Torque Converter Clutch Lock Throttle Position
LK TPS
This parameter is the lowest throttle position for which the torque converter clutch will lock.
Usually this can be left set to 0%, but if there is shudder during deceleration with the torque converter clutch
locked, this parameter can be set to a very small value (just a couple of %) to allow the TCC to unlock when the
throttle is closed.
3.4.4
Torque Converter Clutch Unlock Throttle Position
ULK TPS
This parameter is the highest throttle position for which the torque converter clutch will stay locked. Or, put
another way, this is the throttle position at which the torque converter clutch will unlock and allow the torque
converter to multiply torque.
This should be set somewhat above the throttle percentage used for ordinary driving and cruising in 4th gear.
3.4.5
Torque Converter Clutch Lock Speed
LK SPD
The is the slowest speed at which the torque converter clutch will lock. Note that this speed and the enable gear
must be met in order for a lock to occur.
3.4.6
Torque Converter Clutch Unlock Speed
ULK SPD
This is the speed at which the torque converter clutch will automatically unlock if previously locked. This gives
some buffer room after the lock occurs (based on the Torque Converter Clutch Lock Speed).
Adjusting this parameter properly can help prevent a "hunting" or cycling situation where the TCC turns on and off.