77 280Z. i know i need new bushings and shocks and i just replace the brake system. hit about fifty and shakes like no other.tires are balanced and wheels are true. ball joints? I don't have a clue. thanks everyone!

 

Get the tires re-balanced.

 

most likely one of two things, either you need to get your wheels balanced, or you may have a bent rim (balance can't fix)

 

where did you have them balenced at?

 

or alignment

 

Zs are very sensitive to this because of the way the rack is mounted. What you have is a "dynamic imbalance". The tires must be balanced with weights equal on the inside and outside of the wheel. Otherwize you get a gyro effect at about 45 to 50 mph. Take it back for a correction or get your money back and go somewhere that knows what they are doing.

 

i think arizona has les schwabs, thats why i was asking where you had them balenced at because they suck at balencing them. they will only go up to 50-55mph and often thats not enough. several times i tried having them balence my wheels and they could not do it and the guy said he drove the car....on a 45mph road. i asked him if he went over the speed limit and he said no. i knew he would because of their insurance.