The stepper motor gear on my odometer in my 91 bmw has sheared to two teeth after 168k miles and 23 years. I'm replacing the gears, but I wanted to advance the mileage a bit. My estimate is 200 miles. I've moved it 55 by hand. No drill chuck fits in there. Any good ideas on how to advance it? Turning the shaft that the gears are on does not turn the gears. In the end all, moving it to roughly what it should be is not the end of the world. But I'm not going to take the time and blisters on my fingers taking it up. I don't want to play with pwm-ing the motor.