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Home >> Buick >> 2004 >> Century Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 151 (Automatic Transaxle, 4T65-E (Troubleshooting)) >> Automatic Transaxle (Troubleshooting) >> Harsh Torque Converter Clutch (TCC) Apply or Release

Harsh Torque Converter Clutch (TCC) Apply or Release

WARNING: This page is about a different car, the 2004 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
Harsh TCC Apply or Release

Checks Cause
DEFINITION: An unacceptably quick TCC apply or release occurs in third or fourth gear, Drive or Manual third range, with the throttle held steady.
Control Valve Body Assembly
  • The TCC regulator apply valve (327) is stuck or binding.
  • The TCC regulator apply valve spring (326) is missing or damaged.
  • The TCC control valve spring (336) is missing or damaged.
  • The control valve body spacer plate gaskets assembly (396) are misassembled or contain incorrect parts.
  • TCC PWM Solenoid faulty.
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