Car shakes at 70+mph

[android_proball]

Hello all, when I'm on the hwy and I try to go past 70, my car starts shaking I can feel it through the steering wheel and the front end. The motor CAN go past that limit, however. I just don't know whats causing this? Tires aren't balding, and I already checked for bumps or nipples.. Suspension components that could cause this? I checked all the bushings and balljoints, theye are fine, Any ideas or info is greatly appreciated thanks

[Domesticated]

If the shake is coming through the steering wheel then it is a fore/aft motion. Causes are almost always bushing or balljoint problem. Your tire is shaking back and forth. If most of the energy is transferred into the chassis than it is a tire imbalance. Whether it be weight balance or force balance. Even with in imbalanced tire the steering wheel will still shake, but in phase with the chassis.

[oyajicool]

I would have tires checked for dynamic balance at a tire shop.

[wildBill83]

Yes, have expensive tires mounted using a road force machine. I'll bet the problem is the tire itself is not perfectly round anymore and is now out of balance. A bent rim can do the same thing.

[cloudasc]

Make sure all your wheel wieghts are intact, I've had weights fall off, and cause vibration through the front end at highway speeds.

[C91BLX7]

upper or lower ball joint, tie rod, upper arm bushing or just unbalanced tires.

[android_proball]

Okay, i will have my tires checked. This seems to be very suspicious. And maybe yes, the weights have fallen off. Thanks members when i find a open tire shop and find the problem ill report back to continue or close the thread Thanks!!

[Losiracer2]

i know that loose upper control arm anchor bushings can cause vibs at high speed. Make sure your bushings are in good shape and/or that the bolts tightening them to the control arm going through the bushings are nice and tight.