first of all i have 300zx 4piston calipers on my car.
now everytime i tap the breaks like quick or hard the right front side of my car does a wierd shake bump kind of thing., its wierd and its scary. i took off the rim caliper and rotor. checked all bolts on everything (tension rods, shocks...ect.) and everythings fine. i even took out my pads and sanded them down cause i figured maybe one wasnt gripping. I HAVE NO IDEA what it is! it hasnt stopped and gets worse over the days. its my DD so i kinda want to figure out what it is. any help is greatly appreciatd. thanks guys!