Axle Noise: Knock

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

Fig 1: Identifying Damaged Gear Teeth

Courtesy 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: Identifying Damaged Gear Teeth

Courtesy of FORD MOTOR CO.