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Axle Noise: Knock

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Knock, which can occur on all driving phases, has several causes including damaged teeth or gearset.

Fig 1: Inspecting Differential Ring Gear And Pinion For Damaged Area
G03883264Courtesy of FORD MOTOR CO.

A gear tooth damaged on the drive side is a common cause of the knock. This can usually be corrected by grinding the damaged area.

Fig 2: Inspecting Differential Ring Gear And Pinion For Damaged Area
G04582812Courtesy of FORD MOTOR CO.
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