Abnormal noise (at turning and accelerate) (AWD)

Probable Cause 

• Gear noise
• • Poor gear mesh between ring gear and drive pinion
  • Hypoid gear (wear or damage)
  • Poor pre-road (drive pinion)
  • Debris in hypoid gear area
  • Fluid level too low
  • Distortion of the differential carrier case
  • Excessive backlash (hypoid gear)
  • Excessive backlash (differential gear)
  • Differential side gear spline (wear)

• Bearing noise
• • Bearing (wear or damage)
  • Drive pinion taper bearing (wear)
  • Debris in bearing

• Differential gear noise
• • Side gear and pinion gear (wear or damage)
  • Pinion shaft (damage)
  • Debris in differential gear area

• Pump noise (at lubrication)
• • Debris in pump
  • Rotor (wear or damage)

• Rear differential pump motor noise
• • Bearing (wear or damage)
  • Debris in rear differential pump motor

• Pump noise (at control)
• • Debris in pump
  • Rotor (wear or damage)

• Rear differential solenoid valve noise
• • Debris in rear differential solenoid valve
  • Plunger area or shaft area (wear)
  • Rear differential solenoid valve (wear or damage)

• Clutch chatter
• • Fluid deterioration
  • Clutch facing (burnt or deterioration)
  • Clutch plate (deterioration)

• Loose or missed torqued parts