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Home >> GMC >> 2007 >> Yukon Denali >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Transfer Case - NVG 246-NP8) >> Diagnostic Information and Procedures >> Transfer Case Jumps Out Of Gear

Transfer Case Jumps Out Of Gear

WARNING: This page is about a different variant/trim than selected.
Transfer Case Jumps Out of Gear

Cause Correction
DEFINITION: Loss of the transfer case drive torque during deceleration, acceleration or under load.
Review the Symptoms - Transfer Case  and perform the necessary inspections.
High/low shift fork pads
  1. Inspect the shift fork pads for wear. Refer to Cleaning and Inspection .
  2. Replace the fork pads or other damaged components. Refer to Transfer Case Disassemble  and Transfer Case Assemble .
Faulty high/low range fork
  1. Inspect the high/low range fork for damage or wear. Refer to Cleaning and Inspection .
  2. Replace the high/low range fork if faulty. Refer to Transfer Case Disassemble  and Transfer Case Assemble .
Actuator lever worn
  1. Inspect for excessive wear on the actuator lever - for not allowing full shift fork travel. Refer to Cleaning and Inspection .
  2. Replace the faulty actuator lever. Refer to Transfer Case Disassemble  and Transfer Case Assemble .
Faulty high speed teeth on range sleeve
  1. Inspect for the following conditions:
    • The input gear high speed engagement teeth for wear or damage
    • The engagement teeth on the range sleeve for wear or damage

      Refer to Cleaning and Inspection  .

  2. Replace the range sleeve if the teeth are faulty. Refer to Transfer Case Disassemble  and Transfer Case Assemble .
  3. Replace the input gear if the engagement teeth are faulty. Refer to Transfer Case Disassemble  and Transfer Case Assemble .
High/low planetary carrier
  1. Inspect for the following conditions of the high/low planetary carrier:
    • Low speed engagement teeth worn or damaged
    • Cracked carrier housing
    • Pinion gear bushings worn or out of position
    • Pinion gears broken or damaged teeth
    • Pinion gears seized

      Refer to Cleaning and Inspection  .

  2. Replace the high/low planetary carrier if any of the above conditions are found. Refer to Transfer Case Disassemble  and Transfer Case Assemble .
Input shaft pilot bearing
  1. Inspect the bearing in the input gear and the rear output shaft journal for excessive wear. Refer to Cleaning and Inspection .
  2. Replace the bearing and the rear output shaft if faulty. Refer to Transfer Case Disassemble  and Transfer Case Assemble .
Input gear
  1. Inspect the input gear for broken or damaged teeth. Refer to Cleaning and Inspection .
  2. Replace the input gear if faulty. Refer to Transfer Case Disassemble  and Transfer Case Assemble .