Hey guys Im new here and i have a question for yall. I own a 2001 Buick LeSabre with the 3800v6 and when im driving down the road and i hit 45mph the frontend of the car starts to shake and vibrate but when i speed up it goes away. I have already replaced the tires and had them rebalanced and its still there. I also replaced one cv axle due to a torn boot throwing grease. Is it the transmisson or something esle? Any help would be greatly appericated. Thanks

 

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At speeds that low I''''d check tires for bad belts and runout. These cars are sensitive to the out-of-round tires that work on some cars. Michelins are a round brand that stays round. I have an 03 that came with Michelins and still had a slight amount. If yours has 16 inch rims, it''''s more sensitive in my thinking. The original tires on 15 inch rims were a General tire. These were very soft, easy rolling for gas mileage, and good.


The best way to check for junk tires is Hunter RoadForce balancing on a 9700 balancer. Roadforce variation should be less than 15 or even 12 pounds on a good tire.


Next is the alignment, front and rear, need to be right on. The alignment quickshops like to say it''''s within specs. Well specs is a big ballfield and they need to set alignment at the optimum setting.


Wheel bearings also can be loose/worn allowing some unbalance feeling. Jack up each wheel and move the wheel/tire at 9 and3 o''''clock and then at 6 and 12 o''''clock. You''''ll feel any that have looseness developing.


You might have a bent rim.


Deal with a quality alignment shop; stay away from the fast food type places.


http://hunter.com/pub/product/balancer/index.htm


Learn how the 9700 locates imbalance due to tires.


http://www.gsp9700.com/pub/search/FindGSP9700.cfm


Find shops that have Hunter 9700s in your area.Edited by: imidazol97