2006 Honda TRX680 Rincon Factory Service Manual, Page 51Get this manual
TECHNICAL FEATURES
AUTOMATIC TRANSMISSION SYSTEM
OUTLINE
This three-speed AT (Automatic Transmission) system controls gear selection by means of the AT mechanism that consists of the torque converter and the shift clutches (hydraulic clutch)To control the hydraulic clutch and to shift, the system changes the supply of hydraulic pressure to each clutch (1st, 2nd, 3rd) by activating the respective spool valves with the corresponding solenoid valvesEach solenoid valve is controlled by the PCM, that detects the signal from each sensor and switchThe hydraulic oil for this system is the engine oil, which is supplied from the ordinary oil pump for engine lubrication (page 5-2)The valve body which incorporates solenoid valves and spool valves that control the clutch hydraulic pressure is laid out independently on the crankcase cover to facilitate maintenance (page 14-47) The sub-transmission is laid out in front of the output shaft, and selecting Drive-Neutral-Reverse can be made mechanically by operating the selector lever located near the drivers seat