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Home >> Chevrolet >> 2008 >> Optra LT, Automatic >> Repair and Diagnosis >> Transmission >> Hydraulic Diagrams >> Automatic Transaxle - ZF 4HP 16 - Service, Overhaul, Removal & Installation, Troubleshooting & Diagnosis >> Torque Converter Diagnosis >> Functional Check Procedure

Functional Check Procedure

  1. Install a tachometer or a scan tool.
  2. Operate the vehicle until proper operating temperature is reached.
  3. Drive the vehicle at 80-88 km/h (50-55 mph) with light throttle.
  4. Maintain the throttle position while you lightly touch the brake pedal and verify the release of the TCC and a slight increase in engine speed.
  5. Release the brake slowly, accelerate, and verify a reapply of the TCC with a slight decrease in engine speed.
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