4T45-E Automatic Transaxle

Transmission Replacement (3.5L (LZ4 - Gas, 6 Cyl, 3.5L, SFI, V6, Offset Bore) W/MN5)

Removal Procedure





1. Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement (Air Cleaner Outlet Duct Replacement).
2. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (LAT) (Service and Repair)Battery Negative Cable Disconnection and Connection (LZ4/LY7) (Service and Repair).
3. Disconnect the transaxle wiring harness from the transaxle and the park neutral position (PNP) switch.




4. Remove the shift cable bracket front bolt and shift cable from the lever.
5. Remove the transmission wiring harness from the retainer on the transmission.




6. Disconnect bank 2, O2 sensor 1 electrical connector (4).




7. Remove the left exhaust manifold heat shield.
8. Remove the exhaust manifold heat shield.




9. Remove the front exhaust pipe nuts (1).




10. Remove the upper transmission to engine bolts (2) and stud (4).
11. Install the engine support fixture. Refer to Engine Support Fixture (Engine Support Fixture).
12. Support the radiator and condenser from above using the condenser tabs on each side.
13. Raise the vehicle. Refer to Lifting and Jacking the Vehicle (Service Intervals).
14. Remove the front wheels and tires. Refer to Tire and Wheel Removal and Installation (Service and Repair).




15. Disconnect the bank 2, O2 sensor 2 electrical connector (2).




16. Remove the left catalytic converter to right catalytic converter nuts (3).
(Powertrain shown removed for clarity).
17. Remove the left catalytic converter (1).
18. Remove the steering gear intermediate shaft.

Important: It is only necessary to remove the control arms from the frame if the frame is being replaced.


19. Remove the frame. Refer to Frame Replacement (3.6L) (Frame Replacement (3.6L))Frame Replacement (2.4L) (Frame Replacement (2.4L))Frame Replacement (3.5L) (Frame Replacement (3.5L)).
20. Disconnect the wheel drive shafts from the transaxle. Refer to Wheel Drive Shaft Replacement (Wheel Drive Shaft Replacement).




21. Remove the 3 bolts from the transmission brace near the right axle shaft.




22. Remove the oil pan to bellhousing bolts (1, 3) and bracket (2).




23. Remove the flywheel inspection cover.
24. Remove the starter. Refer to Starter Motor Replacement (LAT) (Service and Repair)Starter Motor Replacement (LZ4) (Service and Repair)Starter Motor Replacement (LY7) (Service and Repair).
25. Mark the relationship of the flywheel to the torque converter for reassembly.
26. Remove the torque converter to flywheel bolts.
27. Remove the transmission oil cooler lines by removing the nut holding the bracket to the transaxle case.




28. Disconnect the vehicle speed sensor (VSS) wiring harness from the sensor.
29. Disconnect the rear heated oxygen sensor (HO2S) harness from the rear transmission mount.
30. Remove the remaining (rear) bolt from the shift cable bracket.
31. Remove the front transmission mount bracket from the transmission.
32. Use a transmission jack in order to support the transmission.




33. Remove the remaining bellhousing bolts (1, 3) and separate the transmission from the engine.
34. Lower the transmission with the transmission jack far enough to remove the transmission.
35. If the transmission is being replace or installed in a holding fixture, remove the rear transmission mount bracket from the transmission.
36. If the transmission is being replaced, remove the PNP switch from the transmission.
37. If the transmission is being replaced, remove the transmission mount.



Installation Procedure

1. If transmission is being replaced, install the following to the transmission:

* The PNP switch
* The torque converter clutch (TCC) lock up clutch O-ring.
* Transfer the transaxle from the bench fixture to the transmission jack.

2. Install the side cover transmission mount bracket to the transmission.
3. Install the rear transmission mount bracket to the transmission.
4. Position the transaxle in the vehicle.





Notice: Refer to Fastener Notice (Fastener Notice).

5. Install the lower transmission to engine bolts (1, 3).

Tighten the bolts to 90 N.m (66 lb ft).

6. Install the front transmission mount bracket to the transmission.
7. Install the wheel drive shafts to the transaxle. Refer to Wheel Drive Shaft Replacement (Wheel Drive Shaft Replacement).




8. Connect the wiring harness to the VSS.




9. Install the torque converter to flywheel bolts.

Tighten the bolts to 62 N.m (46 lb ft).





10. Install the starter. Refer to Starter Motor Replacement (LAT) (Service and Repair)Starter Motor Replacement (LZ4) (Service and Repair)Starter Motor Replacement (LY7) (Service and Repair).
11. Install the flywheel inspection cover bolts.

Tighten the bolts to 10 N.m (89 lb in).

12. Connect the transaxle oil cooler pipes to the transaxle.

Tighten the pipes to 8 N.m (71 lb in).





13. Install the oil pan to bellhousing bracket (2) and bolts (1, 3).

Tighten the bolts to 72 N.m (53 lb ft).

14. Install the 3 bolts to the transmission brace at the final drive area and tighten.
15. Remove the transmission jack.
16. Install the frame. Refer to Frame Replacement (3.6L) (Frame Replacement (3.6L))Frame Replacement (2.4L) (Frame Replacement (2.4L))Frame Replacement (3.5L) (Frame Replacement (3.5L)).
17. Install the engine splash shields.
18. Install the front wheels and tires. Refer to Tire and Wheel Removal and Installation (Service and Repair).
19. Lower the vehicle.
20. Remove the radiator and condenser support and the engine support fixture.




21. Install the upper transmission to engine bolts (2) and stud (4).

Tighten the bolts/stud to 90 N.m (66 lb ft).





22. Install the shift cable bracket and shift cable to the lever.




23. Install the left catalytic converter (3). Refer to Catalytic Converter Replacement - Left Side (LY7) (Catalytic Converter Replacement - Left Side)Catalytic Converter Replacement - Left Side (LZ4) (Catalytic Converter Replacement - Left Side).




24. Connect bank 2, O2 sensor 2 electrical connector (1).




25. Install the left exhaust manifold heat shield.
26. Install the heat shield bolts.

Tighten the bolts to 10 N.m (89 lb in).





27. Connect bank 2, O2 sensor 1 electrical connector (4).




28. Connect the electrical connectors to the PNP switch and transaxle.
29. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (LAT) (Service and Repair)Battery Negative Cable Disconnection and Connection (LZ4/LY7) (Service and Repair).
30. Install the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement (Air Cleaner Outlet Duct Replacement).
31. Add automatic transmission fluid (ATF) and verify the proper fluid level of the transaxle.

Important: It is recommended that transmission adaptive pressure (TAP) information be reset.


Resetting the TAP values using a scan tool will erase all learned values in all cells. As a result, the ECM, PCM or TCM will need to relearn TAP values. Transmission performance may be affected as new TAP values are learned.


32. Reset the TAP values. Refer to Transmission Adaptive Functions (Transmission Adaptive Functions).
33. Road test the vehicle.