Pinpoint Test M: Bearing Failure

• Towing the vehicle without the Transfer Case Neutral Tow mode enabled 
  • If the vehicle is towed with any tires on the ground without first placing the transfer case in neutral tow mode, transmission bearing failure may occur.

• Lubricant overheated 
  • Remove, disassemble, and clean the transmission. If any bearing cage is melted, replace all bearings, replace the shift shaft and gear shift position sensor as a matched pair, and replace the transmission fluid.

• Bearing races or rollers, other internal part failure 
  • Inspect for damaged or worn components. Install new components as necessary. NOTE: Reset the bearing preload if any new tapered bearings are installed.

• Vibration break-up of retainer and brinelling of races 
  • Determine the root cause of the vibration. Inspect all bearings, shafts, and bearing bores for damage or wear that could cause a vibration. Repair or install new components as necessary.

Possible Sources 

• Improperly towing the vehicle
• Lubricant overheated
• Bearing races or rollers
• Vibration break-up of retainer and brinelling of races
• Shafts or bores
• Incorrect bearing preload
• Other part failure

Diagnostic steps are not provided for this symptom or DTC. REFER to: Diagnostic Methods