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3-2 Control Solenoid Valve and 3-2 Control Valve These components are used to increase the exhaust rate of 3rd accumulator fluid, as needed, The 3-2 control solenoid valve is a normally closed On/Off solenoid controlled by the PCM. The Low Speed At lower vehicle speeds, the PCM operates the 3-2 control solenoid valve in the Off In the Off position the solenoid blocks actuator feed limit fluid pressure from the 3-2 With no actuator feed limit fluid pressure, the 3-2 control valve spring force keeps the valve A faster exhaust of the 3rd accumulator exhaust fluid provides a faster apply of the 2-4 High Speed At high vehicle speed, the PCM operates the 3-2 control solenoid valve in the On position This action permits a slow apply of the 2-4 band by blocking off 3rd accumulator exhaust This allows the engine speed to easily come up to the necessary RPM before the 2-4 band is 3rd Accumulator Exhaust Checkball (#7) After the downshift is completed, the #7 checkball unseats and allows the residual fluid in the 3rd Pressure Control (PC) Solenoid Valve Remember that the PC solenoid valve continually adjusts torque signal fluid in relation to the
2007 Hummer H3 2007 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - H3
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