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Home >> Chevrolet >> 2005 >> Chevy Express H1500, Van Passenger >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Automatic Transmission - 4L80-E/4L85-E - Service, Diagnosis & Trouble Shooting) >> Troubleshooting >> No Torque Converter Clutch (TCC) Apply

No Torque Converter Clutch (TCC) Apply

WARNING: This page is about a different variant/trim than selected.
No Torque Converter Clutch (TCC) Apply

Checks Cause
TCC Shift Solenoid Valve (323)
  • Stuck Off
  • O-ring failed
  • No voltage to the solenoid
  • Poor connection
PCM
  • Failed
  • No signal to the solenoid
Brake Switch
  • The contact is corroded.
  • Poor connection
  • Pinched wire
  • Misadjusted
  • No supply voltage
TCC Valve (223) The valve is stuck Off due to sediment or to an undersized bore.
Retainer Pin (211) Broken
Torque Converter (1) Ballooning
Turbine Shaft (502) Plugged oil holes
Turbine Shaft Seals (501) Ineffective
Pump Body Bushing (202) Worn
O-ring (2) Heat set
Oil Transfer Hole Cup Plug Leaking
Regulated Apply Valve (324) Stuck
TCC Valve Release Exhaust Orificed Cup Plug Blocked
Check PCM for the current DTCs.
Refer to Incorrect Torque Converter Clutch (TCC) Apply or Release .
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