Final Drive Noise or Hum Under Light Throttle. Chevrolet Beretta 1996

For 1990-2009 cars

Checks | Cause
--- | ---
Noise may occur in First, Second, or Third

Final Drive Internal Gear (673)

• | Gears are worn or pitted

• | The thrust washer or the thrust bearing mating surfaces are rough or pitted

Differential Carrier (678) | Worn thrust bearing surfaces

Final Drive Sun Gear (675)

• | Gears are worn or pitted

• | The thrust washer or the thrust bearing mating surfaces are rough or pitted

Differential Pinions (816)

• | Pinions are worn or pitted

• | The thrust washer or the thrust bearing mating surfaces are rough or pitted

Differential Side Gears (687)

• | Gears are worn or pitted

• | The thrust washer or the thrust bearing mating surfaces are rough or pitted

Final Drive Sun Gear to Final Drive Internal Gear Thrust Bearing (676) | Thrust bearing races or roller bearing surfaces are rough or pitted
Final Drive Sun Gear to Differential Carrier Thrust Bearing (674) | Thrust bearing races or roller bearing surfaces are rough or pitted
Differential Carrier to Case thrust Bearing (681) | Thrust bearing races or roller bearing surfaces are rough or pitted