The reverse lockout system prevents mis-shifting from 5th gear to reverse.
Shifting 5th gear to or reverse gear.
When the shift lever is moved to the 5th gear-reverse plane, the shift piece pushes and turns the reverse lock cam.
When the shift lever is shifted to 5th gear or reverse, the shift fork moves and completes the gear change. When the shift to 5th gear or reverse is completed, the reverse lock cam is turned back to a neutral position by the return spring.
Shifting from 5th gear to reverse
When shifting out of 5th gear, the shift piece is stopped by the notch in the reverse lock cam, thus preventing a mis-shift from 5th gear to reverse.