What might cause a 1999 prizm front end to vibrate above 60 mph?

Answer 1

This could be one of several problems, my friend has the same year and his did the same thing. His problem was the alignment needed attention. as for what else it may be before asking a mechanic to look at that, possibly for a fee; would be to have the tires checked ( discount tire does it for free). Check them for uneven wear, correct tire pressure for all 4 tires, and have them checked for being "out of round" (tire may appear circular, but unless its machine checked it very well could be the problem). next would be to check the suspension, could have bad shock absorbers or even weak coil springs, or both. To check, go to either side (left or right front), then apply your hands on the fender above the wheel. Give it a good push and remove your hands. The car should come back up and stop with Very little wobble (hopefully no wobble), if it does bounce a few times or wobble for a second or 2, you may want to get the shocks replaced. A wise idea here is to go to the opposite side and repeat. If replacing (doing it yourself) do both at the same time, and very important here, check the top mounting holes for bolt size (my buddy had to have me drill him a new size for one side). last thing I could think of would then be the alignment, since the equipment is very expensive, take it to a repair shop like meinekke, or any place that you trust if you have a mechanic. cost for an alignment is typically $100.00 Hope this helps