Hello all,
I just bought a 99 GS300 for the wife last week. We love everything about the car except for one little problem. As soon as you hit 78-80 mph the ride sucks. There is a constant vibration/bumpiness. It only occurs at speeds of 78+ mph. It is a steads vibration, and it's the whole car. It's not very hard but it is definitely noticeable. It has pretty much brand new tires that were put on at the end of July. They are Good year assurance, and I live in Florida so I'm guessing they're not the all season ones. Is this just the tires or is there some sort of suspension issue here? Thanks in advance for the help.
Justin

 

I had a similar problem once, remembered some one saying to get all the 4 tires balanced. After that it ran smooth at high speeds. Hope this is your problem.
Good Luck.

 

wheel balancing issues, or maybe your bushings are worn out

 

Both are possible. Definitely try the balance first. Find a shop with a good high speed balancer.

 

WELCOME The Reaper

 

Awesome, thanks for the advice guys, my buddies dad is head tech guy at lexus dealership down the road, so I'll see if they can throw them on the balancer at the shop. Thanks again.

 

Thats always good to know, good luck.