Rear tires shake when on freeway

[chips2481]

My rear tires shake as soon as it hits 5th gear. I though it was the differential but I just got that fixed today and it was still shaking just the same as before on the ride home. Any idea what this problem could be?

 

[IZwack]

And it doesnt shake in the lower gears (4 and below) ?

 

[briwayjones]

Sounds like they're out of balance and it's not noticeable until you hit that speed.

 

[chips2481]

It will shake, or maybe it is more like a wobbling when I push hard on the gas. Would this be a symptom of a bad driveshaft or center support bearing? Briwayjones, areyou saying the tires are out of balance?

 

[briwayjones]

Briwayjones, areyou saying the tires are out of balance?

That's what it sounds like to me. It's definitely a possibility.