Question about 2002 Ford Thunderbird

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Vibration in rear end

Any suggestions, I have a 2002 ford thunderbird. when accelerating from a dead stop there is a vibration noise (like the tailpipe or muffler is loose). i had it checked out at three garages (including a ford dealership) and no one can give me an answer. the only possible answer was that the honeycomb worked loose on the catylatic converter and when taking off from a stop i get the vibration sound.

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  • Ford Master
  • 2,899 Answers

When a vibration suddenly starts to happen, it means that something is loosening. Usually it's a panel or a sheet of metal that's vibrating on it's resonant frequency, that's why it goes away with speed, it passed the resonant frequency.
It's very hard to find because you have to be under the car to see it. If you find something you suspect, tighten the screws or put a rubber band on it to test it.

Posted on Apr 08, 2015

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  • Ford Master
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There are several other things which can make a noise. The people you showed the car have the advantage of hearing or feeling the noise that we do not have a chance to do.

A catalytic noise can change with the engine RPM. You can rev up the engine in Park or Neutral and should be able to replicate the noise. If not, then you have a moving part making the noise.

Sometimes the Emergency brake material comes loose from the metal backing and jams inside the rear drum/rotors. It will cause vibration when pulling away from a stop, and eventually will grind into powder.

Rear axle differential clutches. There are friction disks inside some types of rear-ends. A special lube additive makes these work. Sometimes a refill of additive and lube can make marginally performing units more quiet.

U-joints can make noise and vibrate. Its another moving part noise.

The fan clutch can also make noise and vibration. The A/C compressor and compressor clutch bearing can make noise. The A/C clutch operates intermittently depending on pressure and temperature.temperature.

Posted on Apr 16, 2014

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Posted on Jan 02, 2017

  • 187 Answers

SOURCE: Rear differential / axle noise and vibration.

A drive shaft that has lost a balancing weight will vibrate between 40 and 50 mph. If not corrected this could damage the input shaft bearing and seal on the differential causing oil leakage. Differentials are fairly indestructible but if run without oil will fail.
As for the front end you should never run the 4wd on dry pavement. The front differential is a posi traction unit that will turn both wheels at the same rate unlike the rear diff that will allow the inner wheel to turn slower than the outer on turns.

Posted on May 08, 2009

angelo63
  • 129 Answers

SOURCE: 95 ford explorer, grinding noise/vibration at slow speeds.

CHECK YOUR UNIVERSAILS COULD BE WORN OR DRY U NEED TO PULL OUT THE SHAFT TO CHECK PROPLEY CHECK FOR STIFFNESS AND NOTCHEY MOVEMENT

Posted on Dec 16, 2008

  • 653 Answers

SOURCE: 2002 ford Ranger 3.0 v6 (auto) rear end noise when accelerating on curves.

Grab the bed of the truck and vigorously rock the vehicle from side to side. If you hear clunking in the axle, you probably need to check the carrier bearings in the differential. I had the carrier bearings, wheel bearings, and seals replaced in my mother-in-law's 1991 Ranger for $280, and it rides like a new truck. Well, ok, it rides like an 18 year old truck with a new rear end. I provided the wheel bearings and seals to the shop, and they provided the carrier bearing, lube, and labor. While the axles are out, check the surface where the axles ride on the bearings. If they are worn, there are undersized bearing available, but it is usually cheaper and easier to just by new axles.

Posted on Feb 12, 2009

autotherapis
  • 501 Answers

SOURCE: WHEN I ACCELERATE FROM A STOP FELLS LIKE REAR END

I have seen a posi rear that had regular gear lube put in instead of posi fluid. I had my transfer done on my 99 jeep and about three thousand miles latter I was getting a chatter, found out they check the rear while diagnosing the transfer case, and put reg. fluid in it. Sad thing is I was a repair shop but had an extended warranty on my vehicle so decided to farm it out so if there was a problem it was covered. Big mistake.

Check the differential.

Posted on Jan 09, 2010

chrisdianast
  • 8 Answers

SOURCE: 96 thunderbird rear end noise when i take off

sounds like a busted strutt try jacking it up and shake the rear wheel if goes sides to side easily its strutt up and down its a wheel bearing.

Posted on Oct 09, 2012

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