Hello all. IDK if I'm missing a part, manual shows only the spacer and drive gear go on the shaft. When I install the driven gear shaft assembly into the speedo housing, while spinning it CW, the speedo gear (as can be seen by the thing turning) spins. But rotate the shaft CCW (ie. reverse), the drive gear spins out, clear of the driven, and disengages. It does not catch the threads when spun CW again, no more speedometer. I've had this apart several times over the years, might have lost something along the way. Does it look like something is missing or installed wrong? Pic 1. pic inside shaft hole after drive gear has spun out. Pic.2. spacer and drive gear, after housing removed. Pic. 3. driven gear assembly. Any input would be appreciated.