everytime im on the highway, even if im going round 60-70 or more the car starts shaking and the ride starts getting bumpy, so i was thinking it might be the tire rods since it was shaking so bad, or suspension but i dont really think so.

Any help id appreciate it

 

Sounds like your tires might need to be balanced.

What car do you have? Is it stock?

This place is somewhat nearby you if you need a rotary specialist to check out the car http://www.pfsupercars.com/

 

mkay ill look into it, but other than tires, is there anything that could cause that? and its a 1989 GTU non turbo convertible

 

Doubtful. Its definitely not the tie rods.
What rims, tires and suspension are on the car?

 

have you checked your tires? my DD did this and all it needed was balancing, took it to a tire shop and boom no more vibration.

 

Deffinately a balancing problem..
have you hit any major pot holes? could be a buckle that you wouldnt really notice at lower speeds..

 

well the suspension and rims are stock, but the tires are toyo i believe, and yea i think its a balancing problem because even if its low speed, it still bumps so

 

it would be more than worth it to take it to the tyre place (EDIT: That you got them fitted) and give these symptomns to them, theyll soon sort you out, and for free i should hope!

 

sounds like a balancing problem or could be a bent wheel. Take it to a tire shop and have them check it out..