vibration?

[Popsickle]

I just had all my rims repaired, balanced, new tires, and new rotors. But between 70-85mph the car still vibrates at an alarming rate (I literally wouldn't go over 60). Even at lower speeds you can see items in my car constantly shaking. What should I do now... alignment, a better set of tires? Has there been any known problems with the suspension? At times the car feels extremely bouncy even when the road has no dips, then within the same trip it feels pretty stiff and loud. Other times it will go from stiff to bouncy even on routes where it was the other way around. Sorry if it sounds confusing, I had to take some medication

Thanks, Sickler

[szh]

What tires are you using? How old are they?

Z

[M35 Sport]

Well the only thing I can suggest is that maybe your tires need to be road force balanced. And if that does not help you could have a bad drive shaft.

[SteveTheTech]

I just had all my rims repaired

Why and how? Your wheels may have lost a stick on weight. Depending on the original condition of your wheels, you may have excessive lateral runout that standard dynamic balance will not detect. The M45 wheels tend to irrepairably bend easily and having them stripped and resprayed does very little for correct a dent.

I would also recommend a road force balance if done correctly this will tell you what the cause of your vibration is.