GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1999 🢒 Catera 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L30-E 🢒 Transmission Replacement

Removal Procedure

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  1. Disconnect the negative battery cable.
  2. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  3. Remove the shift lever rod from transmission. Refer to Shift Control Linkage Replacement .
  4. Remove the propeller shaft coupling bolts.
  5. Remove the propeller shaft coupling from drive flange. Use a screwdriver to pry propeller shaft coupling away from drive flange.

    6. Object Number: 159703 Size: SH
  6. Remove the access hole plugs from the following components:
    7. • The oil pan (1)
    • The bell housing (2)

    Object Number: 158346 Size: SH
  7. Remove the flywheel to torque converter bolts.
  8. Mark the flywheel and the torque converter for ease of assembly.

    9. Object Number: 159415 Size: MH
  9. Remove the oil cooler inlet (1) and outlet (2) pipes from center pipes.
    10. • Squeeze the clamps
    • Slide the clamp away from the hose connection
    • Remove the hoses from the pipes

    Object Number: 159627 Size: SH
  10. Disconnect the oxygen sensor connectors (1).
  11. Remove the exhaust catalytic converters. Refer to Exhaust System Replacement .

    12. Object Number: 159713 Size: SH
  12. Remove the transmission housing to engine oil pan bolts (1).
  13. Install the transmission support.

    14. Object Number: 159592 Size: SH
  14. Remove the transmission crossmember to mount nuts (1).
  15. Disconnect the transmission crossmember to body bolts (2) and remove crossmember.
  16. Lower the transmission in order to provide access to the upper transmission housing to engine bolts.
  17. Remove the ventilation hose from transmission.
  18. Disconnect the electrical connectors from the following components:
    19. • The transmission control selector switch
    • The adapter case
    • The main case
    • The transmission speed sensor and harness clip from housing
  19. Support the front of the engine.
  20. Remove the upper transmission housing to engine bolts.
  21. Remove the transmission from the vehicle.
  22. Clean the transmission oil cooler and pipe if transmission is serviced.

    23. Object Number: 159720 Size: SH
  23. Clean threaded holes in engine block using a 12 x 1.75 mm tap.

Installation Procedure
  1. Install the transmission into the vehicle using the support fixture.
  2. Install the transmission housing to engine bolts. Apply thread locking compound to threads prior to installation.

    3. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

    Tighten
    Tighten the transmission housing to engine block bolts to 60 N·m (44 lb ft).

  3. Remove the support from the front of the engine.
  4. Connect the electrical connectors at the following locations:
    5. • The transmission control selector switch
    • The adapter case
    • The main case
    • The transmission speed sensor and harness clip to housing
  5. Install the ventilation hose to transmission.
  6. Raise the transmission into position.

    7. Object Number: 159592 Size: SH
  7. Raise the transmission crossmember into position and install crossmember to body bolts (2).

    8. Tighten
    Tighten the body bolts to 45 N·m (33 lb ft).

  8. Install the transmission crossmember to mount nuts (1).

    9. Tighten
    Tighten the mount nuts to 20 N·m (15 lb ft).

  9. Remove the transmission support.

    10. Object Number: 159713 Size: SH
  10. Install the transmission housing to engine oil pan bolts (1).

    11. Tighten
    Tighten the transmission housing to engine oil pan bolts to 20 N·m (15 lb ft).

  11. Install the exhaust catalytic converters. Refer to Exhaust System Replacement .

    12. Object Number: 159627 Size: SH
  12. Install the oxygen sensor connectors (1).

    13. Object Number: 159415 Size: MH
  13. Install the oil cooler inlet (1) and outlet (2) pipes to the center pipes.
    14. • Position the hoses on the pipes.
    • Squeeze the clamps.
    • Slide the clamps toward the hose connection.

    Object Number: 158346 Size: SH
  14. Install the new flywheel to torque converter bolts:
    15. • Observe the marks made during disassembly and align in original position.
    • Ensure weld nuts on torque converter are flush with flywheel.
    • Test the torque converter clutch for freedom of rotation.
    • Remove the retaining compound from the first three threads of the new flywheel to torque converter bolts.
    • Finger tighten all six flywheel to torque converter bolts. Then tighten to specification.

    Tighten
    Tighten the flywheel to torque converter bolts to 30 N·m (22 lb ft).


    Object Number: 159703 Size: SH
  15. Install the access hole plugs on the following components:
    16. • The oil pan (1)
    • The bell housing (2)
  16. Install the propeller shaft coupling to drive flange.

    17. Object Number: 159587 Size: SH
  17. Install the propeller shaft coupling bolts.

    18. Tighten
    Tighten the propeller shaft coupling bolts to 95 N·m (70 lb ft).

  18. Install the shift lever rod to transmission. Refer to Shift Control Linkage Replacement .
  19. Adjust the shift lever rod. Refer to Shift Control Linkage Adjustment .
  20. Inspect the transmission fluid level.

    21. Notice: Automatic transmission oil cooler flushing must be performed when an automatic transmission is removed for service. The flushing procedure should be performed after the installation of the overhauled or replacement transmission. Failure to flush the system may cause damage to the system and its components.

    • Fill the transmission with DEXRON® III until fluid level is at the lower edge of the fill plug hole.
    • Perform transmission fluid level checking procedure. Refer to Transmission Fluid Check .
    • Connect the negative battery cable.
    • Reprogram the applicable accessories. Refer to Reprogramming Accessories After Battery Disconnect in Engine Electrical.