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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 >> Fluid Leak Diagnosis >> Fluid Level Diagnosis Procedure

Fluid Level Diagnosis Procedure

  1. If the vehicle is at operating temperature, allow the vehicle to cool down for 2-4 hours. When the vehicle is at a cool state, start the engine and allow the engine to idle for approximately 5 minutes at 825-875 RPM. If possible drive the vehicle for a few kilometers to allow the transaxle to be within the correct temperature range. Test the transaxle fluid level at temperature 20-45°C (68-113°F).
  2. Switch OFF the accessories, especially the air conditioner and the heater.
  3. With the brake pedal pressed, move the gear shift control lever through the gear ranges, pausing for a few seconds in each range. Return the gear shift lever to Park. Turn the engine OFF.
    4. IMPORTANT: The vehicle must be level to obtain a correct fluid level measurement.
  4. Park the vehicle on a hoist, an inspection pit, or a similar raised level surface.
  5. Place a fluid container below the fluid filler plug.
    6. CAUTION: When the transmission is at operating temperatures, take necessary precautions when removing the check/fill plug, to avoid being burned by draining fluid.
  6. Clean all dirt from around the fluid filler plug. Remove the fluid filler plug Clean the filler plug and inspect for damage to the O-ring.
    • If fluid drains through the filler hole, the transaxle may have been overfilled. The fluid level is correct when the fluid stops draining. Install the fluid filler plug.

      Tighten:  Tighten the plug to 45 N.m (34 lb ft) 

    • If fluid does NOT drain through the filler hole, the transaxle fluid level may be low. Lower the vehicle and start the vehicle in Park, with the park brake and the brake applied. With the engine idling, move the gear shift lever through the gear ranges, pausing a few seconds in each range and adding fluid until you feel the gear application. Return the gear shift lever to Park. Turn OFF the engine and raise the vehicle. Verify that the fluid level is aligned with the bottom of the filler hole. If not, add a small quantity of fluid to the correct level. Install the fluid filler plug.

      Tighten:  Tighten the plug to 45 N.m (34 lb ft) 

  7. Wipe any fluid around the filler plug with a rag or a shop towel.
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