Power Flow - Drive 3 And Manual 3 - SSANGYONG 2004 Rexton 2.7XDi Workshop Manual

Power flow - Drive 3 and manual 3

In Drive 2 and Manual 2, transmission drive is via the input
shaft and forward clutch cylinder. The elements of the trans-
mission function as follows;
• The C2 clutch is engaged to drive the forward sun gear.
• The C1 clutch is engaged to drive the planet carrier.
• The short pinion drives the long pinion clockwise.
• The forward sun gear and the planet carrier are driv-en
clockwise at the same speed therefore there is no
relative motion between the sun gear and the pinions.
• The ring gear and output shaft are driven in a clock-
wise or forward direction at input shaft speed.
• The C4 clutch is applied to bypass the 3-4 OWC and
provide engine braking on overrun.
Control
To maintain this arrangement in the steady state sole-
noids and valves are activated as follows:
• Solenoid S1 is switched OFF. S2 is switched OFF.
• With S1 and S2 switched OFF, the 2-3 and 3-4 shift
valves are held in the third gear position by line 500
pressure.
• The 1-2 shift valve is held in the third gear position by
S1-S2 oil pressure.
• 2nd oil (line pressure) from the 1-2 shift valve is di-
rected to the band apply feed regulator valve and to
the 2-3 shift valve.
Gear State
Drive 3 and Manual 3
BTRA 4 AUTO TRANSMISSION
REXTON SM - 2004.4
C1 C2 C3
X X -
• The band apply feed regulator valve supplies 2nd oil
(regulated to line pressure multiplied by the valve ra-
tio) to the Band Apply Feed (BAF) circuit.
• Band apply feed oil is directed to;
- The outer apply area of the front servo
- The 1-2 shift valve to provide an exhaust port when
the transmission is shifted to first gear
- The 3-4 shift valve for use when the transmission is
shifted into fourth gear
• 2nd oil at the 2-3 shift valve is directed to the 3rd oil
circuit.
• 3rd oil from the 2-3 shift valve is directed to the clutch
apply regulator valve, and to the 4-3 sequence valve.
• The clutch apply regulator valve supplies oil (regu-lated
to line 500 pressure multiplied by the valve ratio) to
the Clutch Apply Feed (CAF) circuit.
The CAF oil is directed to;
- The C1clutch
- The 4-3 sequence valve
• At the 4-3 sequence valve the CAF oil becomes Band
1 Release Feed (B1R-F) oil, and is directed through
the 3-4 shift valve to the spring end of the 4-3 sequence
valve, and to the release side of the front servo piston
to hold band 1 OFF.
• Drive (line pressure) is routed through the 3-4 shift valve
to apply the C4 clutch.
ELEMENTS ENGAGED
C4 B1 B2
X - -
3A2-31
1-2 3-4 LU
OWC OWC CLUTCH
- X -
Y220_3A2420
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN