The sprag can still break from the shock but the drum wont explode. I broke the sprag in my race car on the line testing at my local track because I broke an axle but still drove the car back to the pits and on to the trailer. It was just 4 days before I had to leave for the Keystone Nats. I had to overnight axles from Strange, repair the trans and set up a new rear as the axle broke at the spline and got into the carrier bearings, all while working a night job as well as my machine shop, 5 am Thurs morn I pulled out for the Keys and ran a good race but I was tired for sure.