I have hits front and back (combat purple hearts). Gives our Jeep character, my wife t-boned a Honda CRV (their fault). CRV a lot of damage, JK a dented fog light and it still works ( air bags did not deploy). I let them off, they did not want to file a claim (small town). As for the arthritis, I here you. Changed fluids in both axels, transfer case, transmission, and engine the other day. On my back with biting bugs out, gravel driveway. Had to take Advil and drink a S load of home brew to kill the pain. Good Times