A condition in a sliding gear transmission or shifting mechanism where the selector fork moves the gear or collar too far along the splined shaft. This can cause the engagement dogs to bind, slip out of mesh, or strike adjacent components. It usually results from worn detents, bent shift forks, or excessive force by the operator.
Heard on the job
The transmission got stuck in third gear because an overshift jammed the synchronizer sleeve against the hub.
Related terms
Dogs
Shop name for the chunky engagement teeth on a gear or sliding collar that lock a gear to its shaft.
Crash box
Shop name for an unsynchronized manual gearbox, where shifts grind unless engine and road speed are matched.
Lash
Shop clipping of backlash, the free play between mating gear teeth, as in set the lash or check lash.