Automatic Transmission 4R70W
INSTALLATIONTransmission
Materials
Special Tools:
Special Tool(s)
Installation
All applications
1. Inspect the wiring harness and connectors for damage, condition of terminals, corrosion and seal integrity. Repair or replace as required.
2. Position, then raise the transmission into the vehicle.
WARNING: The torque converter must be held firmly in its installed position.
While holding the torque converter, carefully tilt the front of the transmission downward.
CAUTION: Do not allow the torque converter drive flats to disengage from the pump gear.
While continuing to hold the torque converter raise the transmission downward.
CAUTION: Watch for obstruction.
While continuing to hold the torque converter raise the transmission positioning the extension housing above the exhaust crossover pipe.
CAUTION: Watch for clearance between the transmission and engine and the transmission and exhaust crossover pipe.
Tilt the front of the transmission upward until level.
3. Remove the special tool.
4. CAUTION: Use care not to damage the flexplate and the converter pilot. The torque converter must rest squarely against the flexplate, indicating the converter pilot is not binding in the crankshaft.
Align the torque converter studs with the mounting holes in the flexplate.
Install the transmission to the engine.
4.2L engine
5. Install and alternately tighten the engine oil pan-to-torque converter housing retaining bolts.
4.6L and 5.4L engines
6. Install and alternately tighten the torque converter housing-to-engine retaining bolts.
4.2L engine
7. Install four new torque converter-to-flexplate retaining nuts.
1 Rotate the crankshaft pulley-to-crankshaft retaining bolt to position the torque converter stud in the opening.
2 Install and snug the new torque converter-to-flexplate retaining nut.
4.6L and 5.4L engines
8. Install four new torque converter nuts.
9. Install the flexplate inspection plate and the bolts. Install the rear engine plate-to-torque converter housing retaining bolt.
4.2L engine
10. NOTE: Also refer to the following illustration.
Install the access plugs.
4.6L and 5.4L engines
11. Install the access plugs.
All applications
12. Connect the solenoid body connector.
13. Connect the Output Shaft Speed (OSS) sensor connector.
14. Connect the digital TR sensor connector.
15. If so equipped, install the front A/C deflector assembly with the fasteners.
4.2L and 4.6L engines
16. Install the bracket onto the hanger and position it to the transmission insulator and retainer. Install the bolt.
All applications
17. Install the transmission support crossmember.
1 Install the transmission support crossmember onto the retainer and insulator studs. Install the retaining nuts hand-tight.
2 Raise the transmission, aligning the transmission support crossmember to the frame.
3 Install the stud brackets and the retaining nuts.
4 Tighten the retainer and insulator-to-crossmember retaining nuts.
18. Remove the high-lift transmission jack.
4.2L and 4.6L engines
19. Connect the catalyst monitoring sensor harness connectors.
20. Tighten the clamp.
All applications
21. Install the exhaust heat shield-to-crossmember retaining bolts.
4.2L engine
22. Position the EGR vacuum reservoir to the frame.
- Install the nuts.
All applications
23. Install the starter motor.
24. NOTE: The output shaft and the driveshaft are a balanced assembly.
Install the driveshaft.
- Align the index marks and position the driveshaft on the transmission.
- Position the driveshaft to the rear differential.
25. Install the driveshaft.
1 Install the driveshaft.
2 Install the bolts.
4.6L and 5.4L engines
26. Install the shift cable and bracket.
1 Install the bolts.
2 Connect the clip.
4.2L engine
27. Install the shift cable bracket bolt.
4.6L and 5.4L engines
28. NOTE: Prior to installation, check the condition of the transmission fluid filler tube O-ring. Replace if damaged.
Install the fluid filler tube into the transmission. Position the retaining brackets. Install the bolt and nut.
4.2L engine
29. Install the transmission filler tube and bracket bolt.
30. Install the transmission filler tube bracket bolt. applications
31. With a drain pan correctly positioned, remove the plugs and connect the fluid cooler tubes.
4.2L engine
32. NOTE: Also refer to the following illustration.
Position the fuel and electrical harness bracket for installation.
Install and alternately snug, then tighten, the bolts.
4.6L and 5.4L engines
33. Install the bolts and position fuel line in place.
All applications
34. Connect the electrical harness connectors.
35. Remove the supports and lower the vehicle.
36. Install the engine cover.
37. Install the air cleaner air intake duct assembly.
38. NOTE: When the battery is disconnected and reconnected, some abnormal drive symptoms may occur while the vehicle relearns its adaptive strategy. The vehicle may need to be driven 16 km (10 miles) or more to relearn the strategy.
Connect the battery ground cable.
39. Fill the transmission to the specified level with clean automatic transmission fluid.