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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 >> Symptoms - Automatic Transmission >> Malfunction >> Test Steps

Test Steps

Perform the general procedures according to the automatic transaxle diagnostic procedure:

Condition Action
Defective clutch in the transaxle if no Drive gear is available with the TCM disconnected This condition is usually due to too little oil being added, or to internal damage. Repair is not possible. If necessary, exchange the transaxle.
The kick down switch is not functioning properly For checking and remedial action. Refer to Drive Range - Fourth Gear, Emergency/Substitute Mode  or Drive Range - Third Gear, Emergency/Substitute Mode .
The vehicle is in Emergency mode. For checking and remedial action. Refer to Drive Range - Fourth Gear, Emergency/Substitute Mode  or Drive Range - Third Gear, Emergency/Substitute Mode .