I broke a chain years ago jerking rocks out of the ground so I could mow the yard. Before the chain broke it streched the links to the point that the center on several was almost closed. My old F-150 was not hurt when the chain hit the tailgate, not enough power to do a lot of damage, not the same as with a superduty. The main thing is to take care of which ever one that you use and inspect it before you use it to make sure it is in good condition. The sling will strech and give you a softer start than a chain so it is easier on the drivetrain. If someone is stuck too bad you can put pressure on a strap and hold it and sometimes aafter a little while it will start moving, you cannot so that with a chain. A chain can jerk them out but a strap will strech instead, but will it damage something. The main thing is to have the correct size and hook it up properly so it don't come loose and go flying.