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The hypothetical reason why your car is jerking at speeds of over 55 MPH is probally due to the transmission slipping as it engages into a higher gear. If there is a hard shift of the transmission at higher speeds you may have to have the vehicle serviced soon. My car was doing this once and I had a tire out of round and ready to blow. I had the same problem. It was only when I took off at first, then when I was driving on the interstate it did it whenever I went over 55 mph and the cruise wouldn't work. I had to get the camshaft sensor replaced, and afterward I had no more problems.

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โˆ™ 2008-05-28 23:33:01
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Q: Why would your car jerk when you accelerate over 55 mph?
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