After you replace the traveler car be sure to tie a knot in the traveler line to prevent the car from smashing into the corner casting on wild jibes.
Or, hook one arm around the main sheets or hold them with a hand to control the speed of the boom swinging across the boat.
Don't EVER let the boom swing across the boat unrestrained. Otherwise, you'll bust up equipment (traveler car!!) and/or kill your crew.