Symptom Checks

Check A/T mechanical components and A/T shift solenoids and Torque Converter Clutch (TCC) solenoid operation. See appropriate OVERHAUL or ELECTRONIC CONTROLS article in AUTOMATIC TRANSMISSIONS. If no problems are indicated, go to TEST Z, step 1)  under SYSTEM TESTS in SELF-DIAGNOSTICS - EEC-V - CNG & GASOLINE article and check for intermittent faults.