Daewoo KORANDO Service Manual page 1002

5A-34 AUTOMATIC TRANSMISSION
Manual Valve
The manual valve (refer to figure 3.10) is connected to the vehicle selector mechanism and controls the flow of oil to
the forward and reverse circuits. The manual valve function is identical in all forward gear positions except that in the
Manual 1 position an additional supply of oil is directed to the 1-2 shift valve for application of the rear band and the
C4 overrun clutch.
Figure 3.10 - Manual Valve
1-2 Shift Valve
The 1-2 shift valve (refer to figure 3.11) is a two position valve that must be switched to the (2,3,4) position in order to
get any forward gear other than first gear. It is used for all 1-2 and 2-1 gearshifts.
The switching of this valve is achieved by using S1 and/or S2.
During a 1-2 gearshift drive oil from the manual valve passes through to the second gear circuit. During a 2-1
gearshift the band apply feed oil is allowed to exhaust via the 1-2 shift valve.
The 1-2 shift valve works in conjunction with the 3-4 shift valve (described below) to disengage the C4 clutch in first
gear, and engage C4 in second gear. When Manual 1 is selected the C4 clutch and rear band (B2) are engaged.
Figure 3.11 - 1-2 Shift Valve