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 or in a four wheel drive mode.
Review the
Symptoms - Transfer Case and perform the necessary inspections.
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High/low planetary carrier assembly
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- Inspect the high/low planetary carrier planetary gears for the following conditions:
• | Chipped, bent or deformed teeth |
• | Planetary gear bushings worn |
• | Planetary gear thrust washers missing |
• | Seized or binding planetary gears |
- Replace the high/low planetary carrier assembly if any of the above conditions exist. Refer to
Transfer Case Disassemble and
Transfer Case Assemble.
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Input gear
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- Inspect the input gear teeth for excessive wear or damage. Refer to
Transfer Case Cleaning and Inspection.
- Replace the input gear if faulty. Refer to
Transfer Case Disassemble and
Transfer Case Assemble.
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Thrust washers
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- Inspect for missing or damaged thrust washers for the input gear.
- Inspect the thrust washers for galling.
- Replace the thrust washers if faulty and the mating component if damaged. Refer to
Transfer Case Disassemble and
Transfer Case Assemble.
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Annulus gear
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- Inspect the annulus gear teeth for the following conditions:
• | Metal embedded in the root of the teeth |
- Replace the front case half if the annulus gear is faulty. Refer to
Transfer Case Disassemble and
Transfer Case Assemble.
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