End Clutch

End clutch is engaged at 4th gear. Actually, end clutch is being engaged from 3rd gear.

This is only for smooth shifting to 4th gear).

When it operates, planetary carrier rotates.

Power flow: 

Input shaft--> End clutch retainer--> End clutch--> End clutch hub--> End clutch shaft--> Planetary carrier --> Ring gear--> Transfer driven gear

Fig 1: End Clutch Power Flow Diagram

Courtesy of KIA MOTORS AMERICA, INC.