Valve Body; Manual Valve; 1-2 Shift Valve; 2-3 Shift Valve - SSANGYONG 2004 Rexton 2.7XDi Workshop Manual

3A2-12

Valve Body

Manual valve

The manual valve 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 po-
sition an additional supply of oil is directed to the 1-2 shift
valve for application of the rear band and the C4 overrun
clutch. The manual valve directs the line pressure into the
PRND fluid circuits.

1-2 shift valve

The 1-2 shift valve is a two position valve that must be
switched to the 2, 3 and 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 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.
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN

2-3 shift valve

Y220_3A2090
The 2-3 shift valve is a two position valve. It is used on all
2-3 and 3-2 gearshifts.
The switching of this valve is achieved by S2 which is lo-
cated at the end of the valve spool.
In the 1, 2 position, second gear oil from the 1-2 shift valve
is prevented from entering the third gear circuit.
When the valve is moved to the 3, 4 position, oil from the
second gear circuit is routed to the third gear circuit and
the transmission is changed to third gear.
Y220_3A2100
3-4 shift valve
The 3-4 shift valve is a two position valve. It is used for all
3-4 and 4-3 gearshifts.
The switching of this valve is achieved by S1 which is lo-
cated at the end of the valve spool.
During a 3-4 gearshift the 3-4 shift valve:
• Exhausts the front band release (B1R) circuit thereby
allowing the application of the front band (B1).
• Connects the inner apply area of the front servo (B1AI)
to the Band Apply Feed (BAF) circuit thus allowing
greater apply forces to the front band.
• Exhausts the Overrun Clutch (OC) circuit which al-
lows the C4 clutch to disengage.
During a 4-3 gearshift, the C4 clutch is engaged and the
front band (B1) is released. These actions are se-quenced
by the 4-3 sequence valve.
Y220_3A2110
Y220_3A2120
BTRA 4 AUTO TRANSMISSION
REXTON SM - 2004.4