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Home >> Lincoln >> 2019 >> Nautilus Base, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Automatic Transmission - 8-Speed Automatic Transmission - 8F57 (2 Of 2)) >> Diagnosis And Testing >> Torque Converter Clutch (TCC) >> Symptom Chart

Symptom Chart

WARNING: This page is about a different variant/trim than selected.
Symptom Possible Sources Action
TCC does not apply Solenoid filter blocked to the TCC solenoid INSTALL a new TCC solenoid.
TCC solenoid mechanically stuck off INSTALL a new TCC solenoid.
TCC regulator valve stuck off DISASSEMBLE, CLEAN and INSPECT the TCC regulator valve. If bore or valve is damaged, INSTALL a new main control valve body. REFER to: Main Control Valve Body  .
TCC APPLY hydraulic circuit blocked or leaking DISASSEMBLE and INSPECT the transmission, main control and pump assembly passages for debris/blockage. CLEAN as necessary. INSPECT the TCC hydraulic circuit leak paths, REFER to: Main Control Valve Body  . REFER to: Transmission  . REFER to: Leakage Inspection .
TCC friction material worn or damaged. INSTALL a new torque converter. REFER to: Transmission  .
TCC always applied/stalls vehicle TCC solenoid mechanically stuck on INSTALL a new TCC solenoid.
TCC regulator valve stuck on DISASSEMBLE, CLEAN and INSPECT the TCC regulator valve. If bore or valve is damaged, INSTALL a new main control valve body. REFER to: Main Control Valve Body  .
TCC RELEASE hydraulic circuit blocked or leaking DISASSEMBLE and INSPECT the transmission, main control and pump assembly passages for debris/blockage. CLEAN as necessary. INSPECT the TCC hydraulic circuit leak paths, REFER to: Main Control Valve Body  . REFER to: Transmission  . REFER to: Leakage Inspection .
TCC welded or damaged. INSTALL a new torque converter. REFER to: Transmission  .
TCC cycles, shudders or chatters Incorrect Transmission Strategy programmed into the PCM/ TCM PERFORM transmission strategy download, REFER to: Transmission Strategy Download  .
TCC solenoid filter or seal damaged at TCC solenoid INSTALL a new TCC solenoid.
TCC solenoid mechanically sticking INSTALL a new TCC solenoid.
TCC regulator valve, springs, clips loose, stuck, binding, missing, misassembled DISASSEMBLE, CLEAN and INSPECT the TCC regulator valve. If bore or valve is damaged, INSTALL a new main control. REFER to: Main Control Valve Body  .
TCC RELEASE/TCC APPLY hydraulic circuit blocked or leaking DISASSEMBLE and INSPECT the transmission, main control and pump assembly passages for debris/blockage. CLEAN as necessary. INSPECT the TCC hydraulic circuit leak paths, REFER to: Main Control Valve Body  . REFER to: Transmission  . REFER to: Leakage Inspection .
TCC cycling/shudder/chatter VERIFY the TCC is causing the concern. ATTEMPT to duplicate event while commanding the PID TCC_OSC OFF. If the concern cannot be duplicated while the TCC is commanded off the TCC may be worn or damaged. REFER to: Transmission  .