Torque converter clutch won't engage GM
#1
03-06-08, 07:28 AM
Torque converter clutch won't engage GM
It's a 89 supreme 4-speed automatic and the converter lock-in doesn't engage. I've engaged it by grounding the wire running to the ecm using a remote switch so the fault isn't in the trany. What's the most likely culprits. Just want better milage. P.S. No codes and the AC is disconnected.
#2
03-06-08, 10:34 AM
Mystery solved
Mystery solved. Turns out the coolant thermostat was too cool. Replaced it and the torque converter clutch engaged perfectly.
