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Home >> Cadillac >> 2003 >> CTS Automatic >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle Servicing >> Lubrication >> Draining & Refilling

Draining & Refilling

  1. Raise and support the vehicle.
  2. Place a suitable drain pan under the transmission fluid drain plug.
  3. Remove and discard the transmission fluid drain plug.
  4. Allow the transmission fluid to drain.
  5. Inspect the transmission fluid for discoloration and contamination while draining.
  6. After the transmission fluid has finished draining, install a NEW transmission fluid drain plug. Tighten to specification. See TORQUE SPECIFICATIONS .
  7. Remove the transmission oil pan bolts (3). See Fig 1.
  8. Lightly tap the oil pan (2) with a rubber mallet if necessary in order to loosen.
  9. Remove the oil pan (2) and the gasket (4).
  10. Clean and inspect the following for damage or wear:
    • Magnet (1).
    • Pan (2).
    • Bolts (3).
    • Gasket (4).
  11. Remove the fluid filter (2). Use a long screwdriver in order to pry the fluid filter neck out of the seals. See Fig 2.
  12. Remove the 2 fluid filter seals (1) using Universal Seal Remover (J 23129) and Slide Hammer Adapter (J 6125-1B).
  13. Install 2 NEW fluid filter seals (1), onto the transmission fluid filter neck. See Fig 2. Coat the new seals with a small amount of Transjel Lubricant (J 36850) or petroleum jelly before installation.
  14. Install the transmission fluid filter (2) into the case.
    NOTE: Oil pan gaskets are reusable. Replace the gasket ONLY if the sealing surface is damaged.
  15. Install the transmission oil pan (2) and the gasket (4) at the same time. See Fig 1.
  16. Install the oil pan bolts (3). Tighten to specification. See TORQUE SPECIFICATIONS .
  17. Remove and discard the transmission fluid fill plug. See Transmission Fluid Checking Procedure .
  18. Fill the transmission to proper level. See FLUID CONDITION & LEVEL CHECK .
  19. After filling the transmission, install a NEW transmission fluid fill plug. Tighten to specification. See TORQUE SPECIFICATIONS .
  20. Lower the vehicle.
  21. Inspect the oil pan gasket for leaks.
Fig 1: Removing Transmission Oil Pan
G00170235Courtesy of GENERAL MOTORS CORP.
Fig 2: Removing Transmission Filter
G00170236Courtesy of GENERAL MOTORS CORP.