This is what happend. My rear diff has been making a click sound for awhile. Last night I left the e-brake on for a few sec now the rear of the car is getting very bad vibrations almost undrivable. Is it poss that the rear diff got bent or broke or can something else cause this problem? Would apprieciate the help.

Get under there and check for play in your U-joints. You're describing the classic symptoms of bad U-joints.

Much more likely that a rear rotor has problems, or a wheel bearing or U-joint has gone bad. Also possible that the e-brake cable is binding, and the rotor warped as a result. Nothing real expensive here...