Rear Clutch

Rear clutch is engaged at 1st-3rd gear of D/2/L range. When it is engaged, forward sun gear of the planetary gear rotates.

Power flow: 

Input shaft → Rear clutch retainer → Rear clutch → Rear clutch hub → Forward sun gear → Short pinion

Fig 1: Power Flow Diagram (Rear Clutch)

Courtesy of HYUNDAI MOTOR CO.