Abnormal noise (at accelerate) (AWD)

Probable Cause 

• Gear noise
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    Poor gear mesh between ring gear and drive pinion

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    Hypoid gear (wear or damage)

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    Poor pre-road (drive pinion)

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    Debris in hypoid gear area

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    Fluid level too low

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    Distortion of the differential carrier case

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    Excessive backlash (hypoid gear)

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    Excessive backlash (differential gear)

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    Differential side gear spline (wear)

• Bearing noise
• • -

    Bearing (wear or damage)

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    Drive pinion taper bearing (wear)

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    Debris in bearing

• Pump noise (at lubrication)
• • -

    Debris in pump

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    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

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    Rotor (wear or damage)

• Rear differential solenoid valve noise
• • -

    Debris in rear differential solenoid valve

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    Plunger area or shaft area (wear)

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    Rear differential solenoid valve (wear or damage)

• Clutch chatter
• • -

    Fluid deterioration

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    Clutch facing (burnt or deterioration)

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    Clutch plate (deterioration)

• Loose or missed torqued parts