Cause
| Correction
|
DEFINITION:
A visible indication of an external fluid leak from the transfer case.
Review the
Symptoms - Transfer Case
and perform the necessary
inspections.
|
Drain plug or fill plug leak
|
- Inspect for the correct sealer and amount of sealer on the plugs.
- Correctly install the plugs. Refer to
Transfer Case Fluid Replacement
.
|
Vehicle speed sensor leaking
|
- Remove the vehicle speed sensor (VSS) and inspect for the following
conditions:
• | Cut or damaged O-ring seal |
• | VSS over tightened causing deformation in the VSS |
- Replace the VSS O-ring seal if it is faulty. Refer to
Transfer Case Front Output Shaft Speed Sensor Replacement
or
Transfer Case Rear Output Shaft Speed Sensor Replacement - Left Side
or
Transfer Case Rear Output Shaft Speed Sensor Replacement - Right Side
.
- Replace the VSS if it is faulty. Refer to
Transfer Case Front Output Shaft Speed Sensor Replacement
or
Transfer Case Rear Output Shaft Speed Sensor Replacement - Left Side
or
Transfer Case Rear Output Shaft Speed Sensor Replacement - Right Side
.
|
Encoder motor area leak
|
- Remove the encoder motor and inspect for the following conditions:
• | Inspect the encoder motor insulator for cracks. |
• | Inspect for a faulty control actuator lever shaft bearing. |
• | Inspect the actuator lever shaft for wear or damage. |
- Repair or replace the following components if found faulty:
|
Rear output shaft seal leaking
|
- Inspect for the following conditions:
• | Overfilled or improper transfer case fluid |
• | Seal improperly installed, worn or damaged |
• | Seal bore damaged or cracked |
• | Rear output shaft bushing for excessive wear |
• | Slip yoke seal surface for wear or pitting |
- Repair or replace the following components if found faulty:
• | Clean or properly route the vent hose. |
|
Front output shaft seal leaking
|
- Inspect for the following conditions:
• | Overfilled or improper transfer case fluid |
• | Seal improperly installed, worn or damaged |
• | Seal bore damaged or cracked |
- Repair or replace the following components if found faulty:
• | Clean or properly route the vent hose. |
|
Leaking at the vent
|
• | Transfer case overfilled |
3. | If the transmission fluid level is low, and the transfer case
fluid level is too high, replace the transfer case input shaft seal. Refer
to
Input Shaft Seal Replacement
. |
4. | Inspect for the following conditions: |
• | Seal improperly installed, worn or damaged |
• | Seal bore damaged or cracked |
• | Input shaft seal surface worn, grooved, or damaged |
|
Transfer case to adapter leak
|
- Inspect for the following conditions:
• | Loose mounting fasteners |
• | Gasket or sealant faulty |
• | The transfer case input shaft seal leaking |
- Repair or replace the following components if found faulty:
• | Inspect for the following conditions: |
- | Seal improperly installed, worn or damaged |
- | Seal bore damaged or cracked |
- | Input shaft seal surface worn, grooved or damaged |
|
Front case half to rear case half seam leak
| Disassemble and seal the case halves. Refer
to
Transfer Case Disassemble
and
Transfer Case Assemble
in Transfer Case - NVG 246-NP8 Unit Repair.
|
Case leaking
|
- Inspect for a cracked case or case porosity.
- Replace the faulty case half. Refer to
Transfer Case Disassemble
and
Transfer Case Assemble
in Transfer Case - NVG 246-NP8
Unit Repair.
|