thought I ruined my ariens snowblower but repair man said might have just broke pin on worm gear its a used machine(model #910955)that was given to me and had bolts instead of shear bolts augar stopped turning worked fine for 2 storms. dosent jump or seem to want to catch just blower turns. could i have dodged a bullet? now i was told to drain oil from the gear box and see if by hand i can turn the gear and check for stripped groves or if a little shaving come out from pin holding worm gear on shaft. then line it up and knock out rest of pin but must go through the bottom bolt hole and bang up to have enough room all this to avoid taking the whole augur apart. anybody ever had this problem?