Cause
| Correction
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DEFINITION: A faulty internal transfer case component that causes a growl or grinding noise in the transfer case while the vehicle is turning.
Review the
Symptoms - Transfer Case and perform the necessary inspections.
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Planetary differential
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- Inspect the planetary differential pinion gears for the following conditions:
• | Chipped, bent or deformed teeth |
• | Pinion gear bushings worn |
• | Pinion gear thrust washers missing |
• | Seized or binding pinion gears |
- Inspect the planetary differential for deformation. Refer to
Transfer Case Cleaning and Inspection.
- Replace the planetary differential assembly if faulty. Refer to
Transfer Case Disassemble and
Transfer Case Assemble.
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Sun gears
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- Inspect the sun gears for the following conditions:
• | Worn or galled thrust surfaces |
- Replace the sun gears if faulty. Refer to
Transfer Case Disassemble and
Transfer Case Assemble.
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Thrust washer
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- Inspect the thrust washer for seizure to the planetary differential.
- Inspect the thrust washer for galling.
- Replace the thrust washer if faulty and the mating component if damaged. Refer to
Transfer Case Disassemble and
Transfer Case Assemble.
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Planetary differential not timed properly
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- Inspect the planetary differential for being timed properly. Refer to
Transfer Case Assemble.
- Properly time the planetary differential gears. Refer to
Transfer Case Assemble.
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