my car kinda shakes at high speeds from the middle console inside..... if i start to go with no gas in first gear..just from the release of the clutch the back of the car kinda shifts you can hear it and feel it.... also when i punch it the back of the car feels like its jumping up and down... i mean it should shove to tires to the street and haul ass... but instead the back of the car just shakes. if i drive "regular" theres not too much of an issue..but when i want to punch it that damn things happens? any suggestions... i replaced my drive shaft...made sure exhaust wasnt touching it..i mean i dont know..thanks