Not sure what you are asking but the shift shaft has stepped heights which moves the shift dog thru the shaft. Sometimes oil can get behind the shaft & make a hydraulic lock up & will not shift. Is that what your asking? Happens from sitting & cross flow.
Everything worked well except the driveshaft seal until Frank machined enough room for two seals. Also the shift rod O-ring is not much of a seal too. Use blood pressure cuff tubing above the o ring for a better seal.
