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Hello, and thank you for allowing me the opportunity to help you. If I am not online when you are, please allow me time to return. This is a problem with the torque converter clutch in the transmission. Typically if it was a circuit problem then it would set a code for it. If there is no light then typically it is due to a bad torque converter itself. I typically recommend removing the torque converter clutch solenoid and cleaning it out and it's port out to see if it helps. I would also do an ohm test on it. If these things check out and do not help then replace the converter. Do you plan on fixing this yourself?
Yes I'll fix it if I end up fixing it. Which valve should I clean or replace? The
Torque Converter Clutch Pulse Width Modulation Solenoid Valve or the
TORQUE CONVERTER CLUTCH LOCKUP SOLENOID VALVE???
Do you know if you have the 4L60E or the 4L80E transmission.
It's the 4L60E
The pulse width modulation valve is the one that needs to be removed and cleaned out or replaced to see if it helps.