30.5.3 Torque Converter Clutch (TCC) Parameters
Contains parameters that tune TCC activation and deactivation.
Minimum RPM to Enable TCC - Minimum engine speed at which the TCC will apply. This value can be adjusted so that engines
with large camshafts do not hesitate surge if the TCC is applied at too low of an engine speed.
RPM to Disable TCC - Used to unlock the TCC once it is locked. The Lock and Unlock values should not be too close together, or
they will continuously lock and unlock. Applications with high stall torque converters will typically need 400-700 RPM or more
between these values.
Maximum TPS TCC - Throttle position value when the TCC will unlock. Most lockup torque converters do not have a clutch designed
to lock up when higher power is being applied. It is best to unlock the converter under moderate to hard acceleration. Typically TPS
values should be between 25-50%.
TCC Disable - When enabled, the TCC will never lock up.
Figure 82 Figure 83
Figure 84
30.5.4 Torque Converter Clutch (TCC) (Un) Lock
These parameters work in addition to the TCC Parameters by offering additional tuning based on vehicle speed. This keeps the TCC from
locking up during ‘around-town’ driving if it is not desired. The Lock values should always be higher than the Unlock values. Adjustments
to these can be done by using the graph.
NOTE: See instructions for changing data in the GRAPH screen in the ‘Making Adjustments’ section.
Figure 85 Figure 86
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