Transmission Replacement (NV4500 4WD)
REMOVAL PROCEDURE- Tools Required
- J36221 Quick Connect Disengagement Too[
1. Shift the transmission into 3RD or 4TH speed gear.
2. Remove the shift lever. Refer to Shift Lever.
3. Drain the transmission oil. Refer to Fluid Replacement (NV3500) or Fluid Replacement (NV4500).
4. Remove the propeller shaft. Refer to one of the following procedures in Propeller Shaft:
- Propeller Shaft Replacement (Front Axle-All Except NP8)
- Propeller Shaft Replacement (Front Axle-NP8)
- Propeller Shaft Replacement (System Balanced Assembly)
5. Remove the transfer case. Refer to one of the following procedures in Transfer Case:
- Transfer Case Replacement (Selectable Four Wheel Drive)
- Transfer Case Replacement (Auto Four Wheel Drive )
- Transfer Case Replacement (Manual Four Wheel Drive)
6. Remove the parking brake and controls, if used. Refer to Parking Replacement in Parking Brake.
7. Disconnect the following electrical wiring harness connectors:
- The vehicle speed sensor
- The backup lamp switch
8. Disconnect the wiring harness retainers from the transmission.
9. Disconnect the hydraulic clutch line from the concentric slave cylinder using the J36221.
10. Remove the transmission vent hose.
11. Remove the transmission rear mount.
12. Support the transmission. Use a suitable safety stand.
13. Remove the frame crossmember. Refer to Rear Bumper Brace Replacement in Frame and Bumpers.
14. Remove the transmission to engine bolts.
15. Pull the transmission straight back on the clutch hub splines. Do not let the transmission hang from the clutch plate and clutch cover.
16. Remove the transmission from the vehicle.
INSTALLATION PROCEDURE
1. Install the clutch housing to the engine, if removed.
- Tighten the studs to 100 Nm (74 ft. lbs.).
IMPORTANT:
- Do not force the transmission into the clutch.
- Do not let the transmission hang from the clutch. Leave the safety stand under the transmission for support.
2. Install the transmission.
2.1. Put a thin coat of high-temperature grease on the main drive gear splines.
2.2. Shift the transmission into 3RD or 4TH speed gear.
2.3. Rotate the transmission clockwise onto the clutch hub splines.
2.4. Install the transmission to the clutch housing bolts and washers.
^ Tighten the bolts to 31 Nm (23 ft. lbs.).
NOTICE: Refer to Fastener Notice in Service Precautions.
3. Install the frame crossmember. Refer to Rear Bumper Brace Replacement in Frame and Bumpers.
4. Install the transmission rear mount.
5. Remove the safety stand from beneath the transmission.
6. Install the transmission vent hose.
7. Install the hydraulic clutch line to the concentric slave cylinder quick connect.
8. Install the wiring harness retainers to the transmission.
9. Connect the following electrical wiring harness connectors:
- The vehicle speed sensor
- The backup lamp switch
10. Install the transfer case. Refer to one of the following procedures in Transfer Case:
- Transfer Case Replacement (Selectable Four Wheel Drive)
- Transfer Case Replacement (Auto Four Wheel Drive )
- Transfer Case Replacement (Manual Four Wheel Drive)
11. Install the propeller shaft. Refer to one of the following procedures in Propeller Shaft.
- Propeller Shaft Replacement (Front Axle-All Except NP8)
- Propeller Shaft Replacement (Front Axle-NP8)
- Propeller Shaft Replacement (System Balanced Assembly)
12. Install the parking brake and controls, if removed. Refer to Parking Brake Replacement in Parking Brake.
13. Fill the transmission with new oil. Refer to Fluid Replacement (NV3500) or Fluid Replacement (NV4500).
14. Remove the safety stands.
15. Lower the vehicle.
16. Install the shift lever to the transmission. Refer to Shift Lever.