Have you opened it and check the soft link between the motor and the chuck head? If not you may wish to do so, my bet is its sheared in the middle. Ive replaced a couple of mine with about an inch of clear vinyl fuel line tubing about "3/8 from Ace hardware. Works like a champ, much cheaper than buying a new tool. Or jsut send it to me and I'll see to its ah ah..... its proper rest. Ya that's what it needs rest. lol