Question about 2001 Buick LeSabre

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Hi, I have a 2001 Buick. We just replaced the front tires. Shortly after that we noticed the car vibrates at around 45 to MPH, after we get past this mph the vibration stops. It is not worse when we turn corners or change lanes. We just spent $2,000. on front end to correct the problem, we were told, but this has not helped. The mechanic double checked the front end and everything is tight. He also checked the tires, one was slightly off balance but not enough to cause problem, he still corrected that. You do not feel the vibration in the steering wheel but in the body of the car at the speed stated. Can anyone help us with this dilemma? TY so much in advance.

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  • jcvmw Sep 14, 2009

    Thanks for your help. I ran the car up yo around 45mph, when it began its vibration and took my foot off the pedal, the vibration immediately stopped, when we accelerated again the vibration came back until we got past about 50mph or so.

    I will have my transmission flushed, change the filter and see if this helps.

  • jcvmw Sep 27, 2009

    OK, I have not done this yet. What do you suggest I do? I have been operating the car and notice clearly when it vibrates 40 to 50 MPH and take my foot off the pedal the vibration immediately stops, when I accelerate again vibration come back.

    Should I just change fluid and filter?

  • jcvmw Jan 06, 2010

    After spending $1,000 at one repair shop with no success I went to another. They repaired it, the problem was with both CV joints, its a front wheel drive.

  • greg starks May 11, 2010

    Just a few words of wisdom. Flushing the transmission oftern creates more problems because it breaks loose little bits and pieces of debris and they fly back up into the works causing further damage. Unless you have owned the car since it was new and flushed the transmission regularly according to the maintenance schedule, it is usually better not to take the risk of flushing it, unless as a last resort.



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Let me see know at 45 miles per hour a vehicle usually shifts gears into the highest gear so could it be the torque converter hanging up and not shifting quick enough or maybe its the U joints. Have the transmission fluid checked for proper level and color.
Here's a small test for you when your accelerating up to 55 miles per hour try letting off the pedal at 44 miles per hour and then reaccelerating up to the 55 mph and tell me if it`s smoother if it is then chances are that it`s hang up on third gear. There's also a electric sensor located on transmission that assist shifting it`s usually controlled by the engine timing.
One more thing did the repair man check to see if the tires where directional tires if there not put on right it could cause vibration and early wear out .Hope i helped you.

Posted on Sep 10, 2009

Testimonial: "This must be the solution. It did as you stated. I am surprised my mechanic did not think of this."

  • Mabron Stevenson
    Mabron Stevenson Jan 06, 2010

    So i was wright the u joints or also called cv joints where bad.


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Torque converter need to be replace that a transmission problem

Posted on May 20, 2013

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Swich front tires with rear tires hub wheel and all.
next turn the front rotors smooth to spec.
do a wheel balance on the wheels tires while on the car.
do an alignament
check front shocks

Posted on Sep 10, 2009

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Sometimes it is not balance, but tires out of round. This is more common than you may think. Regardless of how old or new your tires are. Have a reputable shop check this for you.

Posted on Sep 10, 2009

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