diff --git a/firmware/controllers/tcu/tc_4.cpp b/firmware/controllers/tcu/tc_4.cpp
index 72527132bf..3b0bd9762d 100644
--- a/firmware/controllers/tcu/tc_4.cpp
+++ b/firmware/controllers/tcu/tc_4.cpp
@@ -56,11 +56,14 @@ void Generic4TransmissionController::setTccState(gear_e gear) {
 		int lockSpeed = interpolate2d(tps.Value, config->tcu_tccTpsBins, config->tcu_tccLockSpeed);
 		int unlockSpeed = interpolate2d(tps.Value, config->tcu_tccTpsBins, config->tcu_tccUnlockSpeed);
 		if (vss.Value > lockSpeed) {
+			torqueConverterDuty = 100;
 			enginePins.tcuTccOnoffSolenoid.setValue(1);
 		} else if (vss.Value < unlockSpeed) {
+			torqueConverterDuty = 0;
 			enginePins.tcuTccOnoffSolenoid.setValue(1);
 		}
 	} else {
+		torqueConverterDuty = 0;
 		enginePins.tcuTccOnoffSolenoid.setValue(0);
 	}
 }
diff --git a/firmware/controllers/tcu/tcu_controller.txt b/firmware/controllers/tcu/tcu_controller.txt
index 2897d6e0e0..fa0b28abfa 100644
--- a/firmware/controllers/tcu/tcu_controller.txt
+++ b/firmware/controllers/tcu/tcu_controller.txt
@@ -4,5 +4,6 @@ struct_no_prefix tcu_controller_s
 	float lastShiftTime
 	uint8_t tcu_currentRange;"TCU: Current Range";"", 1, 0, 0, 0, 0
 	int8_t pressureControlDuty;"TCU: EPC Duty";"%",1,0,0,100,0
+	int8_t torqueConverterDuty;"TCU: TC Duty";"%",1,0,0,100,0
 	bit isShifting;
 end_struct
diff --git a/firmware/tunerstudio/tunerstudio.template.ini b/firmware/tunerstudio/tunerstudio.template.ini
index b25c0f7b8c..003021f704 100644
--- a/firmware/tunerstudio/tunerstudio.template.ini
+++ b/firmware/tunerstudio/tunerstudio.template.ini
@@ -1638,6 +1638,7 @@ gaugeCategory = Transmission
 	shiftTimeGauge = lastShiftTime, "Last Shift Time", "S", 0, 2, 0, 0, 2, 2, 4, 4
 	idealEngineTorqueGauge = idealEngineTorque, "idealEngineTorque", "",	0,	100,	0,	0,	100,  100,	4,	4
 	pressureControlGauge = pressureControlDuty, "EPC Duty Cycle", "%", 0, 100, 0, 0, 100, 100, 0, 0
+	torqueConverterGauge = torqueConverterDuty, "TC Duty Cycle", "%", 0, 100, 0, 0, 100, 100, 0, 0
 
 gaugeCategory = Knock
 	knock1Gauge = m_knockCyl1, "Knock Cyl 1", "dBv", -60, 10, -60, -60, 10, 10, 0, 0