I have a 98 GMC Jimmy that is shaking severely in the front end, but it doesn't do it all the time, I have changed the master cylinder, new calipers all around,new brakes all around, new rubber brakes lines, new rotors,new ball joints(upper and lower). Now the reason I just listed all of this is because when it starts shaking if you hit the brakes it shakes twice as hard,but you can tap the brakes 3 or 4 times and it will stop, for awhile, does anyone have any suggestions on how to fix this thing, and I have also had two completely different sets of wheels and tires on it as well
