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Warning: A blowout at this speed and you could lose more than just your car! It could be that the tires are out-of-balance, a bad tie-rod end, bad universal/cv joint, or several other reasons along that line. The front end on most cars will shake a little bit after hitting 100 mph. Make sure that everything's tight. You might rotate and balance your tires as well. Where and why are you going that fast!? Try checking the tires themselves if you've already had them ballanced, continuose high speed driving can actually cause the cords or ply's to separate. Causing a minute imballance in the the tire itself, imperceptable at low speeds but enough to notice at higher speeds. FEAR! The idea that you still have pedal, and a lot of curves ahead...... Worry is at what point do you slow down or PUNCH it? The vibration ends at 115 mph usually for me! I had the same problem with mine. All I did was rebalance my tires and i was good to go. You might want to take a look and see how the wear is on your tires. There is no fear, only pure Pontiac Speed :] these cars tend to vibrate cuz of there driveshaft i put an aluminum one on mine hardly any noise at all and of course tightening everthing and lube it up Driveshaft I would say. No tires ever made mine stop vibrating at 110.

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โˆ™ 2009-03-24 01:52:47
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Q: What would cause a 1997 Pontiac Firebird to vibrate between 105 and 115 MPH?
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