Just kidding. I think you already know the answer. Is it safe, obviously not cause the driveshaft is shaking a mothafucker while you drive/shift. If you have to drive it, drive slow at take off, no hard acceleration... you can probably feel it shake and hear the noise under/by your shifter. You can order a new OEM one at your local dealership or online. Installation isnt that bad. You will need I believe a 27m socket to separate. Impact tools does help but could be done without.