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Vibration and low pitched hum when in gear and stopped 2002 Explorer automatic

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Check your transmission fluid

Posted on Sep 28, 2009

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1 Answer

Low pitch humming noise


May well be. You might want to check your coolant. If you're low (but not yet overheating) your fan will come on more often.

Nov 07, 2013 | 2004 Infiniti G35 Sport Coupe

1 Answer

Ford Explorer 2002 grinding and vibration under 60 mph


you have wheel bearings failing
the random abs light is the rotor for the sensor touching the sensor head because the wheels are loose on the shaft

Apr 15, 2017 | 2002 Ford Explorer

1 Answer

My 2002 Ford Explorer 4WD has a significant humming noise/light vibration while driving and sounds like the rear differential bearings/gears. How can I tell/pinpoint the problem?


Usually, the rear pinion bearing will make a higher pitched whining noise under a slight load. As soon as the throttle pedal is released, the noise stops. The rear axle shaft bearings will make a lower growling rumble when they are bad.

Another thing to check are the Emergency brakeshoes inside the hub of the rear rotors. The shoe material frequently separates from the rusty shoe plates and the bonded material gets pulverized. This would be similar to a "rocks crushing" sound and can cause vibration in the drivetrain.

The U-joints can cause this problem too. Check for rust and oil streaks which appear shortly before the U-joints fall apart. You should find telltale streaks on the undercarriage of your vehicle.
The front driveshaft can cause noise without being powered. There is just enough sympathetic rotation when the 4 wheel drive is Off, to cause sounds and vibration.

Testing can be aided by using a Commercial hoist and having the drivetrain engaged with the engine running. You would observe the shaking or use a probe "long broom handle" to the stationary parts like the axle tubes, differential housing, pinion bearing area, and so on. This would require a helper to sit in the hoisted vehicle and a second person to stand under a running machine. Not for the faint of heart. No baggy or loose fitting clothes, no long hair, etc.

Now there is a specialized machine which can Electronically investigate noise and vibration. There are sensors which are placed under the vehicle and it listens to vibrations. I saw one machine one time. It helps in balancing driveshafts too. A driveshaft balancing shop may be able to fix you up.

I hope my solutions are very helpful to you. If you do not have the exotic testing equipment you may have to drop the driveshafts to check your U-joints.

Jan 26, 2011 | 2002 Ford Explorer

1 Answer

2004 Chrysler Crossfire 25,000 mls auto, road hum noise


MOST of the hums after a while come from the diff as the back axle does the driving and almost all its life runs the same way except when going in reverse ,is the rear diff meshing and worn on both the crownwheel and the pinion and the humming gets slightly louder the faster you go and almost goes when almost stopped and this can also be the slight vibration you get so get the diff oil drained and refilled and check if there is any metal in the oil when drained if so thats your problem But it will last for years like that..Let me know how you get on RON

Oct 23, 2009 | 2004 Chrysler Crossfire

1 Answer

2002 grand cherokee laredo humming/grinding


sounds like you have a problem with one of your lines on your power steering or one of its components. the grinding noise could also be one of your pulleys that have gone bad too. check your steering assemby gear box.

Jul 26, 2009 | 2002 Jeep Grand Cherokee

4 Answers

Noise and vibration above 50 mph


Sounds like front differential or front drive axle issues. Check the front differential gear oil then take er' to the dealership before you end up spending a bunch of $. Most people change their oil frequently in the engine but forget about flushing the transmission fluid and changing oil in the front and rear differentials. I have three Ford 4X4s. Two which really get used hard. The 93 has 311K miles and still runs excellent. Trans and differentials get a fluid change every 25K miles and moble one synthetic engine oil changes every 5k miles.

Jan 25, 2009 | 2005 Ford F-150

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