The locking sequences from the epicyclic equipment coach are reached by hydraulic pressure running brake bands or multi-plate clutches. Here is the segment with the transmission that hooks up towards the push shaft -- Therefore if this part won't be able to spin, the car won't be able to transfer. https://juliusevjwg.boyblogguide.com/32694286/how-gearbox-auto-can-save-you-time-stress-and-money