Hello All! Basically the car is fine until around 70 mph when at that point and any speed higher it has a vibration but the weird thing is it stops as soon as you are off the gas. You could be doing 75-80 with a pretty good vibration throughout the car but as soon as you are off power the shaking stops. I have had this for a little while and am really having trouble finding the cause for the vibration. I have replaced the guibo/flex disc, center support bearing, and just had all the wheels repaired and rebalanced. Please help this is driving me MAD!!!