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3-4 Accumulator Checkball (#1) As the accumulator fluid fills the 3-4 accumulator, it seats the #1 checkball and is forced through orifice #18. Accumulator Valve Biased by torque signal fluid pressure and spring force, the accumulator valve regulates the D-4 fluid into the 2-3 Shift Solenoid (SS) Valve This solenoid remains de-energized as in fourth gear and the signal B fluid exhausts through the solenoid. 2-3 Shift Valve Train The AFL fluid pressure at the 2-3 shift valve holds the valves in the upshift position. This allows the servo feed Torque Converter Clutch Solenoid Valve TCC PWM Solenoid Valve The PCM de-energizes the TCC solenoid valve, and operates the duty cycle of the TCC PWM solenoid valve to Pressure Control (PC) Solenoid Valve Remember that the PC solenoid valve continually adjusts the torque signal fluid pressure in relation to the
2004 Hummer H2 2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E (Introduction) - Hummer H2
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