Question about 2001 Pontiac Bonneville

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WHY DOES MY CAR KEEP SHAKING WHEN I AM IN OVERDRIVE OR HAVE A FEW PEOPLE IN THE CAR????

MY CAR KEEPS SHAKING IN THE FRONT END PRETTY HEAVILY WHEN I AM IN OVER DRIVE HOWEVER THIS IS WHERE I AM STUCK I HAVE HAD THE FRONT END LOOKED AT AND THEY SAY THERE ARENT ANY PROBLEMS ALSO I JUST HAD BRAND NEW SET OF TIRES PUT ON FOR 550 AND THE TRANSMISSION WAS REBUILT AS I BOUGHT THE CAR WITH A BAD TRANSMISSION THEY TOLD ME IT WAS A BALANCE ISSUE AND NOT THE TRANSMISSION SO I HAVE TAKEN 5 TIMES TO HAVE THE TIRES REPLACES AND REBALANCED AND ROTATED STILL SHAKES THE CRAZY PART IS IT ONLY DOES IT 50-55 AND UP AND ONLY WHEN I GIVE IT GAS IF YOUR COASTING IT SMOOTH AND GOES IN A STRAIGHT LINE NO PROBLEMS BUT THE MINUTE YOU GIVE IT GAS IT SHAKES THE ENTIRE CAR OR IF I HAVE A FEW PEOPLE IN THE CAR I NOTICE A SLIGHT SHAKE AT LOWER SPEED WHEN I GIVE IT GAS SAY ABOUT 38-45 I HAVE TAKEN MY CAR EVERYWHERE AND THEY ALL SAY SOMETHING DIFFERENT TIRES,RIM,TORQUE CONVERTOR ETC. BUT TRANSMISSION SHOP SAYS NO WAY PLEASE HELP THANK

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  • Pontiac Master
  • 1,632 Answers

First thing to do is check the engine plenum gasket for leaks and change the gasket at the breather to engine conection . Next check the TPS throtle position sensor and MAF , and Vacum leaks at engine . Was the car in an accident to have damaged the control arm ? check it .

Posted on Dec 14, 2014

  • nate clem Dec 14, 2014

    THE CAR FAX SHOWS IT WAS NOT IN AN ACCIDENT HOWEVER YOU NEVER KNOW I WILL CHECK THOSE THINGS AND THANKS FOR THE HELPFUL ADVICE AND I WILL LET YOU KNOW WHAT I FIND....

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

polarcycle
  • 1392 Answers

SOURCE: front end shaking 1996 Ponitac Bonneville SE

Check for runout in your wheel bearing hubs. You can also hit your e brake lightly and see if it shakes then. If it does, it is in the rear rotors which will also warp.

Posted on Mar 07, 2009

co7196
  • 3433 Answers

SOURCE: 1994 pontiac transport se sluggish running

Ck your exhaust pipe at rear of car noting any obnoxious smell like rottrn eggs. Hold a piece of paper, I use a dollar bill ,in in front of the exhaust. If it blows the paper gently, you have a catalyctic converter going or is bad. Will need replace if so.

Posted on Jun 02, 2009

ftw1952
  • 10319 Answers

SOURCE: The car shakes really bad about 40-50 mph but when

you are apply torque to the engine upon pushing on the gas pedal so the law of nature states the engine mount maybe broken

Posted on Feb 03, 2010

Flytyinggirl
  • 17 Answers

SOURCE: I have a 2002 pontiac

You may want to check the water pump if it's overheating, have the motor mounts checked if the vehicle is shaking and the alignment and tire pressure are fine, first check the fuses for the interior lights. As for the clicking sound in front tires - please provide further explanation as to the sound, speed of vehicle when it happens, and mileage on the vehicle - could be the CV's but not enough information to assess.

Posted on Jan 05, 2011

  • 836 Answers

SOURCE: 2005 Grand Prix shakes at

Sounds like you have a broken belt in one of your rear tires, or a bent wheel. This would feel like the car is rocking a little bit like a boat on small waves. You can check this out by lifting the rear tires off the ground a slowly rotate them while looking at the tread, if you see the tire really wobble or have a bump in one spot that's it.

Posted on Mar 09, 2011

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1 Answer

Is overdrive activated when the light at the end of the gear shift is on or off on a Lincoln navigator 2001


If the "Overdrive Off" indicator is illuminated, this will prevent the torque converter from locking and engaging overdrive. This can be useful when traveling through hilly regions or when heavily loaded to keep the transmission from continuously hunting for the correct gear. When the light is off, the transmission will operate normally, including locking the torque converter and engaging OD. You should normally drive with the light off. If the light is flashing, that's an indication of a transmission diagnostic trouble code being present.

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I am thinking about your comment of "One side shaking". This sounds more like a loose wheel or dragging out of round front rotor. Then when you comment about the vibration stopping briefly when accelerating or decelerating, that's a lot like U-joint play. The U-joint has play and tightens at the extreme edge of its mount as it rocks from Torque direction changes.

I would say to have an Alignment shop check the front suspension and driveshaft. These inspections are not something a beginner should do.

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Front end shakes heavily when making right hand turns and when the car reaches a speed of 40 mph and continues to shakes well into the 70 mph zone. I have replaced the outer tie rods because a shop told me...


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