Differential Brake Noise Problems
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Differential Brake Noise Problems

Your vehicle makes many sounds. Most are normal while the vehicle is in motion. But there are times when a noise coming from under the car can be a serious matter. Here are a few common noises that may come from the rear axle that need immediate attention.

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brake noise tech tipYour vehicle makes many sounds. Most are normal while the vehicle is in motion. But there are times when a noise coming from under the car can be a serious matter. Here are a few common noises that may come from the rear axle that need immediate attention:

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A “whirring” noise while decelerating at any speed is most likely caused by bad pinion bearings or loose pinion bearing preload. This condition is typically always diagnosed as a bad ring and pinion gear.

A “howl” or “whine” during acceleration over a small or large speed range is usually caused by worn ring and pinion gears or improper gear setup.

“Rumbling” or “whirring” at speeds over 20 mph can be caused by worn carrier bearings. The noise may change while cornering or turning.

Regular “clunking” or loud “clicking” every few feet may indicate a broken ring or pinion gear tooth.

“Banging,” “clicking” or “clunking” while cornering can be caused by broken cornering gears (commonly called spider gears), lack of sufficient positraction lubrication or worn positraction clutches.

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A “rumble” while cornering or turning may indicate bad wheel bearings.

A steady vibration that increases with the vehicle’s speed can be caused by worn U-joints or an out-of-balance driveshaft.

“Clunking” or “clicking” when starting to move or getting on and off the gas might be loose yokes, bad U-joints or worn transfer case or transmission parts.

NOTE: All unusual or strange noises produced by the driveline while driving have a root cause and should be thoroughly investigated to prevent serious damage to the vehicle or the operator.

Courtesy of SKF

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