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Home >> Chevrolet >> 2003 >> Venture Base, Van Cargo Extended >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission Servicing >> Lubrication >> Draining & Refilling

Draining & Refilling

CAUTION: DO NOT use any type of grease to retain parts during the assembly of this unit. Using greases other than the recommended assembly lube changes the transaxle fluid characteristics. Using greases other than the recommended assembly lube causes undesirable shift conditions and/or filter clogging. Use Transjel(tm) Lubricant (J-36850) or equivalent during the assembly of this unit.
  1. Raise and support the vehicle.
  2. Place a drain pan under the transaxle bottom oil pan.
  3. Remove the oil pan bolts (23) from the front. See Fig 1 .
  4. Remove the oil pan bolts (23) from the sides.
  5. Loosen the rear oil pan bolts (23) approximately 4 turns.
    NOTE: Ensure care is taken NOT to damage the mating surfaces of the oil pan and of the case or oil leaks may occur.
  6. Use a rubber mallet to lightly tap the oil pan or use a screwdriver to pry the oil pan loose.
  7. Allow the fluid to drain.
  8. Remove the remaining oil pan bolts (23).
  9. Remove the oil pan (24).
  10. Remove the oil pan gasket (25).
  11. Inspect the oil pan and the filter screen for the following foreign material:
    • Inspect for metal particles.
    • Inspect for clutch facing material.
    • Inspect for rubber particles.
    • Inspect for engine coolant.
  12. Determine the source of the contamination if foreign material is evident.
  13. Correct the source of the contamination.
  14. Use solvent to clean the screen and blow-dry if reusing. Install a new seal (101). See Fig 2 .
  15. Install the filter (100). See Fig 1 .
  16. Inspect the oil pan flange (1) for distortion. See Fig 3 .
  17. Straighten the oil pan flange (1) if distorted.
  18. Inspect the washers on the bolts when service requires the removal of the bottom oil pan.
  19. Install a new bolt and washer assembly if the washer is inverted. See Fig 4 .
  20. Inspect the oil pan (24) for the following conditions:
    • A damaged sealing surface.
    • A dented or cracked bottom surface.
  21. Inspect the oil pan gasket (25) for the following conditions:
    • A bent or damaged seal core.
    • A damaged rubber seal surface.
  22. Inspect the oil pan magnet for the following conditions:
    • Damage.
    • Misalignment.
  23. Clean the oil pan, the gasket and the magnet in order to remove any sediment.
    NOTE: Ensure the oil pan and the case flanges are dry and are free of any oil film or leakage may result.
  24. Use solvent to clean the case. Air dry the case. Use solvent to clean the oil pan gasket surfaces. Air dry the oil pan gasket surfaces. Ensure all traces of the old gasket material are removed.
  25. Install the oil pan gasket (25). See Fig 1 .
  26. Install the oil pan (24).
  27. Install the oil pan bolts (23). See Fig 4 . Tighten the oil pan bolts (23) to specification. See TORQUE SPECIFICATIONS  .
    CAUTION: DO NOT overfill the transaxle. Overfilling of the transaxle causes foaming, loss of fluid, shift complaints, and possible damage to the transaxle.
  28. Lower the vehicle.
  29. Adjust the fluid level. See CHECKING FLUID LEVEL & CONDITION  .
  30. Inspect for proper completion of the repairs. Inspect for fluid leaks.
Fig 1: Removing & Installing Oil Pan & Filter
G00087722Courtesy of GENERAL MOTORS CORP.
Fig 2: Installing Oil Filter Seal
G00087724Courtesy of GENERAL MOTORS CORP.
Fig 3: Inspecting Oil Pan Flange
G00087723Courtesy of GENERAL MOTORS CORP.
Fig 4: Identifying Conical Washers
G95E13700Courtesy of GENERAL MOTORS CORP.
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