When does it shake? Just when you drive a certain speed or when you are using the brakes? If it shakes above a certain speed, your tires need balancing or you could have a bent/damaged wheel or damaged suspension parts. If it shakes only while braking, then your rotors are warped and you need to turn then so they are true, or replace them with new, along with a brake job.
Thomas
the "Mustang Guy"
1987 5.0 LX Mustang
2016 Mustang GT - current daily
2004 Satellite Vibe &
2009 Red Vibe GT -twin's cars
2003 Neptune Vibe GT - prior daily
2010 Red Vibe GT - RIP 6/16/14
2006 Platinum Vibe - son's car
-incorrect torque on lug nuts
-misaligned wheels
-uneven wear pattern on tire
-debris in the wheel
-dirt/rust between wheel and hub
-brake pad deposits on the rotor.