Transmission system

A transmission system, comprising:

• a first gear selector assembly, wherein the first gear selector assembly includes a first selector ring and a second selector ring, the first selector ring and the second selector ring being movable translationally relative to one another;
• wherein the first selector ring includes a first set of engagement members fixed together by a first annular member, and each engagement member in the first set includes a first part located on a first side of the first annular member and a second part located on a second side of the first annular member, each first part having a first drive face oriented generally in a first rotational direction and a first non-drive face oriented generally in a second rotational direction, and each second part includes a second drive face oriented generally in the first rotational direction and a second non-drive face oriented generally in the second rotational direction;
• and
• wherein the second selector ring includes a second set of engagement members fixed together by a second annular member, and each engagement member in the second set includes a first part located on a first side of the second annular member and a second part located on a second side of the second annular member, each first part having a first drive face oriented generally in the second rotational direction and a first non-drive face oriented generally in the first rotational direction, and each second part includes a second drive face oriented generally in the second rotational direction and a second non-drive face oriented generally in the first rotational direction;
• a first input shaft directly connected to the output of a drive source, a second input shaft connected to the output of the drive source via a friction clutch, an actuator assembly arranged to control movement of the first and second selector rings, a first lay shaft, a first gear element rotatably mounted on the first lay shaft, a second gear element rotatably mounted on the first lay shaft, wherein the first selector assembly is mounted on the first lay shaft and is arranged to selectively lock each of the first gear element and the second gear element for rotation with the first lay shaft;
• and
• a second gear selector assembly mounted on the second input shaft, a third gear element rotatably mounted on the second input shaft, and a fourth gear element rotatably mounted on the second input shaft, wherein the second gear selector assembly is arranged to selectively lock each of the third gear element and the fourth gear element for rotation with the second input shaft.