
AUTO TRANSMISSION
KYRON SM - 2005.09
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
84
3650
Shift Groups
The hydraulic control range (including shift elements), which is responsible for the pressure distribution before, during
and after a gear change, is called a shift group.
The hydraulic system consists of 3 shift groups.
A shift group can be in two phases.
1. Shift phase
2. Stationary phase
In the shift phase, a change takes place in one shift group of the engaged clutch/brake. The other two shift groups
are then in the stationary phase.
Shift group C1/B1 (gear change 1-2/4-5) is responsible for the up/down shifts 1-2/2-1 and 4-5/5-4. It includes:
1. Clutch C1
2. Brake B1
3. Command valve
4. Holding pressure shift valve
5. 1-2/4-5 shift solenoid valve
6. Pressure overlap control valve
7. 1-2/4-5 shift solenoid valve
Shift group C2/C3 (gear change 2-3) is responsible for the up/down shifts 2-3/3-2.
It includes:
1. Clutch C2
2. Clutch C3
3. Command valve
4. Holding pressure shift valve
5. 2-3 shift solenoid valve
6. Pressure overlap control valve
7. 2-3 shift solenoid valve
Shift group C3/B2 (gear change 3-4) is responsible for the up/down shifts 3-4/4-3 and the engagement process.
It includes:
1. Clutch C3, 3-4 pressure overlap control valve
2. Brake B2, 3-4 shift solenoid valve
3. Brake B3
4. Command valve
5. Holding pressure shift valve
6. 3-4 shift solenoid valve
Summary of Contents for KYRON 2006
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