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Automatic Transmission Servicing: Other Chevrolet TrailBlazer I

Automatic Trans 5 illustrations ~880 words

Preparation

  1. After transmission repairs, DO NOT reconnect the oil cooler pipes.
  2. Remove the fill cap (9) on the Transmission Oil Cooler and Line Flusher (J-35944-A) and fill the flusher tank (4) with 20-21 oz. (0.6L) of flushing solution using the measuring cup (6). DO NOT overfill. (Scheme 87)
  3. Install the fill cap (9) on the flusher and pressurize the flusher tank (4) to 80-100 psi (550-700 kPa), using the shop air supply at the tank air valve (9).
  4. With the water supply valve (1) on the flusher in the OFF position, connect the water supply hose (7) from the flusher to the water supply at the faucet.
  5. Turn ON the water supply at the faucet.

Scheme 87

Scheme 87
Scheme 87

Flow Check

Note. The Flow Test must be performed after the flush to ensure that all flushing solution and water is removed from the oil cooling system.

  1. Disconnect both hoses from the oil cooler pipes. Connect the oil cooler feed pipe, bottom connector, to the transmission for normal flow.
  2. Clip the discharge hose (5) onto the empty oil drain container. (Scheme 88)
  3. Confirm the transmission is filled with ATF. See «CHECKING FLUID LEVEL & CONDITION»(ref-154782-S35168564032003052300000).
  4. Start the engine with the transmission in Park range and run for 30 seconds. A minimum of 2 qts. (1.9L) must be discharged during this 30-second run time.
  5. If fluid flow is greater than 2 qts. (1.9L) in 30 seconds, connect the oil cooler feed pipe to the bottom connector on the transmission.
  6. If fluid flow is less than 2 qts. (1.9L) in 30 seconds, perform the following diagnosis: Disconnect the discharge hose (5) from the oil cooler return pipe. Disconnect the oil cooler feed line at the radiator. Connect the discharge hose (5) to the cooler feed line, radiator end. Clip the discharge hose (5) to the empty oil drain container. Start the engine with the transmission in Park range and run for 30 seconds. A minimum of 2 qts. (1.9L) must be discharged during this 30-second run time.
  7. If the amount of transmission fluid flow remains less than 2 qts. (1.9L) in 30 seconds, inspect the oil cooler feed pipe, bottom connector, for restrictions or damage. If no condition is found with the feed pipe, bottom connector, inspect the transmission.

Scheme 88

Scheme 88
Scheme 88

Clean-Up

  1. Disconnect the water supply hose from the flusher and bleed any remaining air pressure from the flusher tank.
  2. Remove the fill cap from the flusher and return any unused flushing solution to its container. Rinse the flusher with water. DO NOT store the flusher with flushing solution in it.
  3. After every third use, clean the flusher as described in the instructions included with the tool.
  4. Dispose of any waste water/solution and transmission fluid in accordance with local regulations.

ON-VEHICLE REPAIRS

Note. Various components may be serviced without transmission removal, depending on application. For servicing of these components, see appropriate component under ADJUSTMENTS and/or REMOVAL & INSTALLATION . For additional information on testing electrical components, see appropriate DIAGNOSIS article.

PARK/NEUTRAL POSITION SWITCH

Note. The following procedure is for vehicles that have not had the switch removed or replaced. If the switch has been removed or replaced, see PARK/NEUTRAL POSITION SWITCH under REMOVAL & INSTALLATION. Apply the parking brake. The engine must start in the Park and Neutral positions only. Check the switch for proper operation. If adjustment is required, proceed as follows

  1. The transmission must be in the Neutral position only.
  2. With an assistant in driver's seat, raise and support vehicle.
  3. Loosen the switch retaining bolts and rotate the switch slightly, while the assistant attempts to start engine.
  4. After engine starts, turn engine OFF.
  5. Tighten PNP switch bolts to specification. See «TORQUE SPECIFICATIONS»(ref-154782-S37141348322003052300000) .
  6. Lower the vehicle.
  7. Ensure vehicle does not start in any range other than Park and Neutral. Replace the PNP switch if proper operation can not be achieved.

SHIFT CABLE

  1. Ensure the range selector cable is not restricted.
  2. Ensure the floor shift control is in the Park position.
  3. Raise and support the vehicle.
  4. Disconnect the range selector cable (4) from the range selector lever ball stud (6). (Scheme 89)
  5. Ensure the range selector lever is in the mechanical Park position. (Rotate the range selector lever fully clockwise).
  6. Release the locking tab (2) and slide the secondary lock cover (1) to the side. (Scheme 90)
  7. Carefully squeeze the locking tabs (1) together to disengage the primary lock. (Scheme 91)
  8. Disengage the primary lock. Spring tension will push the end of the cable past the ball stud. NOTE: If the cable end is pushed rearward past the ball stud during the adjustment procedure, it must be released and allowed to come forward of the ball stud. The cable end must then be pushed back just enough to be installed to the ball stud.
  9. Push the end of the cable until it is aligned with the ball stud.
  10. Install the cable (4) to the ball stud (6). (Scheme 89)
  11. Seat the primary locking tabs (1). (Scheme 91)
  12. Slide the secondary lock (2) over the primary lock. (Scheme 90)
  13. Lower the vehicle.
  14. Check the vehicle for proper operation.

Scheme 89

Scheme 89
Scheme 89

Scheme 90

Scheme 90
Scheme 90

Scheme 91

Scheme 91
Scheme 91

EXTENSION HOUSING REAR OIL SEAL

Note. Tools required: Rear Extension Seal Installer (J-21426), and Transmission Assembly Lubricant (J-36850).

Note. Tools required: Neutral Position Switch Adjustment Tool (J-41364-A).

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