diff --git a/src/torque_converter.cpp b/src/torque_converter.cpp
index 1b6bef18..da80ffad 100644
--- a/src/torque_converter.cpp
+++ b/src/torque_converter.cpp
@@ -38,8 +38,10 @@ TorqueConverter::TorqueConverter(uint16_t max_gb_rating)  {
     this->slip_average = new FirstOrderAverage<int32_t>(50); // 20ms div * 50 = 1 second moving average
 }
 
-void TorqueConverter::set_shift_target_state(InternalTccState target_state) {
-    this->shift_req_tcc_state = target_state;
+void TorqueConverter::set_shift_target_state(SensorData* sd, InternalTccState target_state) {
+    if (sd->output_rpm < TCC_CURRENT_SETTINGS.force_lock_min_output_rpm) {
+        this->shift_req_tcc_state = target_state;
+    }
     this->is_shifting = true;
 }
 
@@ -232,11 +234,6 @@ void TorqueConverter::update(GearboxGear curr_gear, GearboxGear targ_gear, Press
     pm->set_target_tcc_pressure(this->tcc_pressure_current);
 }
 
-uint8_t TorqueConverter::progress_to_next_phase(void) {
-    uint8_t ret = 100;
-    return ret;
-}
-
 TccClutchStatus TorqueConverter::get_clutch_state(void) {
     TccClutchStatus ret = TccClutchStatus::Open;
     InternalTccState targ = this->target_tcc_state;
diff --git a/src/torque_converter.h b/src/torque_converter.h
index 7e509e7c..ab48bc25 100644
--- a/src/torque_converter.h
+++ b/src/torque_converter.h
@@ -42,14 +42,11 @@ class TorqueConverter {
                 this->tcc_slip_map->save_to_eeprom();
             }
         };
-        void set_shift_target_state(InternalTccState target_state);
+        void set_shift_target_state(SensorData* sd, InternalTccState target_state);
         void on_shift_ending(void);
 
         void diag_toggle_tcc_sol(bool en);
 
-        // In % (0-100) - 100 is returned if already at next phase
-        uint8_t progress_to_next_phase(void);
-
         void set_stationary();
 
         int16_t get_slip_filtered();