Cause
| Correction
|
DEFINITION: While shifting from HI range to LO range, there is gear clashing or no HI range; or the transfer case will not shift from 2 wheel drive to 4 wheel drive.
Review the
Symptoms - Transfer Case
and perform the necessary inspections.
|
Mode shift clash
|
- Disassemble the transfer case. Refer to
Transfer Case Disassemble
in Transfer Case - NVG 263-NP1 Unit Repair.
- Inspect the synchronizer for being faulty. Refer to
Transfer Case Cleaning and Inspection
in Transfer Case - NVG 263-NP1 Unit
Repair.
- Replace the synchronizer if faulty. Refer to
Transfer Case Assemble
in Transfer Case - NVG 263-NP1 Unit Repair.
|
Mode block
|
- Disassemble the transfer case. Refer to
Transfer Case Disassemble
in Transfer Case - NVG 263-NP1 Unit Repair.
- Inspect the synchronizer sleeve for sliding freely on the rear
output shaft.
- Inspect the synchronizer for being faulty.
- Replace the synchronizer if faulty. Refer to
Transfer Case Assemble
in Transfer Case - NVG 263-NP1 Unit Repair.
If the symptoms occur during cold temperatures, flush and fill the front axle with synthetic fluid. Refer to
Front Axle Lubricant Replacement
in Front Drive Axle.
|
High/low range shift fork
|
- Inspect the high/low shift fork for the following conditions:
• | The roller on the shift fork for wear or damage |
• | Worn or melted range fork pads |
• | Cracked or bent shift fork |
- Replace the following components if found faulty:
|
High/low range sleeve
|
- Inspect the high/low range sleeve for the following conditions:
• | Engagement teeth for burrs or damage |
• | Sliding freely on the rear output shaft |
• | The range sleeve shift fork collar for excessive wear |
- Replace the range sleeve if faulty. Refer to
Transfer Case Disassemble
and
Transfer Case Assemble
in Transfer Case - NVG 263-NP1
Unit Repair.
|
Input gear needle bearing
|
- Inspect for the following conditions:
• | Failed needle bearing in the input gear |
• | Journal on the rear output shaft for excessive wear or damage |
- Replace the bearing if faulty.
- Replace the rear output shaft if damaged.
|
High/low planetary carrier
|
- Inspect the high/low planetary engagement teeth for burrs or damage.
Refer to
Transfer Case Cleaning and Inspection
in Transfer Case - NVG 263-NP1
Unit Repair.
- Replace the range sleeve if faulty. Refer to
Transfer Case Disassemble
and
Transfer Case Assemble
in Transfer Case - NVG 263-NP1
Unit Repair.
|