hey everybody! I let out the clutch on the way to work today and after a loud BANG, my 122 wagon decided not to move any more. I have a manual 4 speed w/d-type overdrive. when I put it in gear and step on the pedal my speedometer shows I'm going real fast, even though I'm not moving. so I know everything is good to the point where the speedometer cable is connected. The driveshaft does not turn when I do this, so I'm thinking the output shaft at the back of the overdrive is snapped off inside. Is this a fixable part, or do I just need to find a whole new overdrive to bolt up? Any help is much appreciated!!