Assembly for blocking and enabling a shifting position of a shifting element

A system for locking and releasing a shifting position of a shifting element that is hydraulically actuatable by an actuating pressure, the shifting element arranged coaxially with a transmission shaft in a transmission housing of an automatic transmission of a vehicle, the system comprising:

• a return flow locking valve for selectively locking and releasing the shifting position of the shifting element, the return flow locking valve subjectable to a control pressure that is separate from the actuating pressure of the shifting element, the return flow locking valve arranged radially inward relative to the shifting element in the transmission housing.