Car shakes still? My 94 Ford Taurus shakes on the highway. 65-80 mph and after 80 it stops?

I've gotten new tie rods, a realignment, new breaks, and resurfaced rotors, and it still happens to shake even though the mechanic said that the problem was the rotors being warped. Before I spend more money on the damned thing I was wondering if anyone here had some insight to why it's still shaking on the highway. One thing I've noticed is that when I accelerate a chirping sound ensues and chirps faster as I go faster? Any ideas? Please?

A tire that is not balanced. Brake rotors will not cause it unless you are pressing on them. I'm surprised you have a 94 Toreass that is still running. Mine suffered a transmssion and head gasket failure, P.O.S.

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