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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 338 (Transfer Case - Mp 3023/3024-NQH) >> Diagnostic Information and Procedures >> Transfer Case Jumps Out of Gear

Transfer Case Jumps Out of Gear

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Transfer Case Jumps Out of Gear

Cause Correction
DEFINITION: Loss of the transfer case drive torque during deceleration, acceleration or under load or the transfer case jumps out of gear and into a neutral position.
  1. Inspect for the correct fluid level.
  2. Inspect the drain plug for large metal deposits. Small metal flakes and fine metal dust on the plug magnet are to be considered normal.

Review the Symptoms - Transfer Case  and perform the necessary inspections.
Transfer case control actuator lever bearing Inspect for a worn or damaged control actuator lever and/or bearing
Replace components as required.
Transfer case Actuator motor brake
NOTE:
  • The actuator motor brake may lead to a will not shift or jumps out of gear condition
  • If the condition is caused by a brake electrical condition, a DTC will be set.
  • If the condition is caused by a brake electrical condition, a DTC will be set.
Inspect the electrical system for a properly operating actuator motor.
Rear output shaft snap ring broken or out of position
NOTE:

A broken or out-of-positioned rear output shaft snap ring may lead to a will-not-shift or jumps-out-of-gear condition.

Inspect for a broken or out-of-position rear output shaft snap ring.
Transfer case shift fork broken or fork pads broken or missing
NOTE:

A growl, rattle, or grinding noise that occurs when a shift is commanded may be caused by broken or missing shift fork pads which may lead to incomplete engagement of the high/low clutch teeth. Refer to High/Low Shift Components Cleaning and Inspection .

Replace the shift forks and pads as required. Refer to Transfer Case Disassemble , and Transfer Case Assemble .