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 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 for being faulty.
- Replace the synchronizer sleeve 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 Replacement
.
|
High/low range shift fork
|
- Inspect the high/low shift fork for the following conditions:
• | The shaft on the shift fork for wear or damage |
• | Worn or broken 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 mainshaft |
• | The range sleeve shift fork collar for excessive wear |
- Replace the range sleeve if faulty. Refer to
Transfer Case Disassemble
and
Transfer Case Assemble
.
|
Input gear needle bearing
|
- Inspect for the following conditions:
• | Failed needle bearing in the input gear |
• | Journal on the mainshaft for excessive wear or damage |
- Replace the bearing if faulty.
- Replace the mainshaft if damaged.
|
High/low planetary carrier
|
- Inspect the high/low planetary engagement teeth for burrs or damage. Refer to
Transfer Case Cleaning and Inspection
.
- Replace the high/low planetary carrier if faulty. Refer to
Transfer Case Disassemble
and
Transfer Case Assemble
.
|