Transfer Case Whine or Rumble Noise. GMC Truck Safari

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 2002 🢒 Safari - 4WD 🢒 Driveline/Axle 🢒 Transfer Case - NVG 136-NP4 (One Speed Automatic) 🢒 Transfer Case Whine or Rumble Noise

Cause	Correction
DEFINITION: A faulty internal transfer case component that causes a noise in the transfer case. Review the Symptoms - Transfer Case and perform the necessary inspections.
Faulty bearings	Inspect all bearings and journals. Replace any faulty bearings, and any components with faulty bearing journals. Refer to Transfer Case Disassemble and Transfer Case Assemble in Transfer Case - NVG 136-NP4 Unit Repair.

Cause

Correction

DEFINITION: A faulty internal transfer case component that causes a noise in the transfer case.

Review the Symptoms - Transfer Case and perform the necessary inspections.

Faulty bearings

Inspect all bearings and journals. Replace any faulty bearings, and any components with faulty bearing journals. Refer to Transfer Case Disassemble and Transfer Case Assemble in Transfer Case - NVG 136-NP4 Unit Repair.