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
.
- Inspect the synchronizer for being faulty. Refer to
Two/Four Wheel Drive Shift Components Cleaning and Inspection
.
- Replace the synchronizer if faulty. Refer to
Transfer Case Assemble
.
|
Mode block
|
- Disassemble the transfer case. Refer to
Transfer Case Disassemble
.
- Inspect the synchronizer sleeve for sliding freely on the synchronizer hub.
- Inspect the synchronizer sleeve or synchronizer hub for being faulty.
- Replace the synchronizer sleeve or synchronizer hub if faulty. Refer to
Transfer Case Assemble
.
If the symptoms occur during cold temperatures, flush and fill the front axle with synthetic fluid. Refer to
Front Axle Lubricant Level Inspection
.
|
High/low shift fork spring assembly
|
- Inspect the high/low shift fork spring assembly for the following conditions:
• | Worn high/low shift fork pin |
- Replace the following components if found faulty:
• | The high/low shift fork spring assembly |
• | The high/low shift fork pin |
|
High/low shift fork
|
- Inspect the high/low shift fork for the following conditions:
• | Cracked or bent shift fork |
- Replace the following components if found faulty:
|
High/low clutch
|
- Inspect the high/low clutch for the following conditions:
• | Engagement teeth for burrs or damage |
• | Sliding freely on the rear output shaft |
• | The high/low clutch collar for excessive wear |
- Replace the high/low clutch if faulty. Refer to
Transfer Case Disassemble
and
Transfer Case Assemble
.
|
Input shaft pilot bearing assembly
|
- Inspect for the following conditions:
• | Failed input shaft pilot bearing in the input shaft |
• | Journal on the rear output shaft for excessive wear or damage |
- Replace the bearing if faulty. Refer to
Input Shaft Pilot Bearing Replacement
.
- Replace the rear output shaft if damaged. Refer to
Transfer Case Disassemble
and
Transfer Case Assemble
.
|
High/low planetary carrier assembly
|
- Inspect the high/low planetary engagement teeth for burrs or damage. Refer to
High/Low Planetary Carrier Cleaning and Inspection
.
- Replace the high/low planetary carrier assembly if faulty. Refer to
Transfer Case Disassemble
and
Transfer Case Assemble
.
|