Normal Operation Of 2000 4L30-E Transmission: Notes

Torque Converter Clutch (Electronically Controlled Capacity Clutch (ECCC)) Application Conditions: 

The clutch apply is controlled by moving the converter clutch control valve by commanding Torque Converter Clutch (TCC) solenoid using PWM signal.

The TCC is normally applied in 2nd, 3rd and 4th gears only when all of the following conditions exist:

• The engine coolant temperature is above 70 °C (158 °F) and ATF temperature is above 18 °C (64.5 °F)
• The brake pedal is released.
• The shift pattern requests TCC apply.

Moreover, TCC is always applied in 2nd, 3rd and 4th gears when the transmission oil temperature is above 135 °C (275 °F).

This mode should be canceled at 125 °C (257 °F).