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HOMESERVICE MANUALSCHEVROLET2001CHEVY EXPRESS G2500, VAN PASSENGER EXTENDED, 5.0 MREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 755 (AUTOMATIC TRANSMISSION, 4L60-E/4L65-E (TROUBLESHOOTING))TROUBLESHOOTINGNO TORQUE CONVERTER CLUTCH (TCC) APPLY (300 RPM SLIP)
2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 M

No Torque Converter Clutch (TCC) Apply (300 RPM Slip)

2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 MSECTION No Torque Converter Clutch (TCC) Apply (300 RPM Slip)
WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
No Torque Converter Clutch (TCC) Apply

Checks Causes
Valve Body Assembly (60)
  • Regulator apply valve side loading
  • Stuck converter clutch valve
  • TCC apply valve stuck closed (debris in bore)
  • TCC/PWM solenoid broken/cracked
  • Turbine shaft O-ring omitted
  • TCC/PWM solenoid leaking
Input Housing and Turbine Shaft Assembly (621)
  • Turbine shaft hole not drilled to full depth
  • Scratched turbine shaft journals
  • Turbine shaft O-ring omitted/damaged
  • Turbine shaft retainer and ball assembly restricted or damaged
Electrical
  • 12 volts not supplied to transmission
  • Outside electrical connector damaged
  • Inside electrical connector damaged
  • Wire harness damaged
  • TCC solenoid damaged
  • Electrical short (pinched wire)
  • TCC solenoid not grounded
Torque Converter Clutch (1) Internal damage (blue or distorted)
Oil Pump Assembly (4)
  • TCC spring cocked
  • Orifice cup plug restricted or damaged
  • Pump to case gasket mispositioned
  • Converter clutch valve retaining ring mispositioned
  • Converter clutch valve stuck or assembled backward
Transmission Fluid Pressure Manual Valve Position Switch (69)
  • Contamination
  • Damaged seals
Solenoid Screen (367A/367B) Blocked
TCC Solenoid Valve (Part of 66) Internal damage
Engine Speed Sensor Internal damage
Engine Coolant Temperature Sensor Internal damage
Automatic Transmission Fluid Temperature Sensor (Part of 69) Internal damage
Brake Switch Internal damage
PCM Internal damage
TCC PWM Solenoid (Part of 66) Internal damage
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.