my truck shakes at high-way speed. is it the tires? or could a rim be bent?

Asked by May 21, 2011 at 03:14 PM about the 2002 Ford Excursion Limited 4WD

Question type: Maintenance & Repair

a tire sales man balanced the tires. he says if it still shakes u have flatt spotts on the tire.

7 Answers

could be any of what you posted,or a bad u joint in driveshaft.

3,045

A failed u-joint will not cause the vehicle to shake in the manner you described. I would have a mechanic inspect the front steering and suspension components to verify they dont have undesired play in any joint causing uneven tire wear/shake. Even with a bent rim the wheel/tire assembly can most times be balanced to allow a smooth ride. Also, if the tire shop is reputable they should be able to perform a road force variance balance which would tell you if there is an underlying issue with the soundness of the tires. How much life is remaining?

4 out of 4 people think this is helpful.

you are very wrong on the u joint.

Kudos Jon, you were bright enough to realize that a u-joint problem isnt speed specific. Some people aren't that bright.

1 out of 1 people think this is helpful.

A bad u joint makes a clunking sound when the car is put into gear while at a dead stop. drivetrain problems are not speed specific, they are consistent with engine RPM. Keep hanging in there, you'll learn all this someday.

2 out of 2 people think this is helpful.
20

A u joint is speed sensitive. It goes around with the back tires… that said, my bad vibration was a faulty u joint. At 35mph it would start to shake and around 65 the harmonic balance of the out of balance driveshaft would take over and be not as bad.

2 out of 2 people think this is helpful.

Missed the fact the transmission is engaged at 'highway speed' Jason.

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