When I get up to 80 mph and let off the gas there is this wierd vibration and its only when im around 80 to 85 any help thanks.

 

Vibration in your steering wheel? Seat? Be more specific on where its coming from.

 

The whole car vibrates I was thinking something with my brakes?

 

How many miles on your car? Have you gotten an alignment along with tire balancing lately? Might want to try that.
Maybe your driveshaft?

 

Auto or Stick ... if you let off gas and put car in neutral does it still vibrate?

 

dealer

 

My car has 40000 miles on it i did a test pulled it out of gear to neutral and the vibration still there but only at 80 mostly in the stick and seat going to get new tires soon

 

possibly your torque converter or input bearing. Hard to tell without physically feeling it. You need to take it in for service either at your dealer or local shop. Sometimes a problem like this is obvious but most of the time it takes some troubleshooting.