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Fig. 491: Overdrive Range, Third Gear Hydraulic Circuit Diagram OVERDRIVE RANGE, FOURTH GEAR - TORQUE CONVERTER CLUTCH APPLIED At higher vehicle speeds, the Hydra-matic 4L60-E transmission uses an overdrive gear ratio 1-2 Shift Solenoid (SS) Valve Energized (turned ON) by the PCM, the normally open solenoid closes and blocks signal A fluid 2-3 Shift Solenoid (SS) Valve De-energized (OFF) as in third gear, the 2-3 shift solenoid valve exhausts signal B fluid through 1-2 Shift Valve D432 fluid pressure from the 2-3 shift valve and spring force hold the valve in the upshift position
2007 Hummer H3 2007 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - H3
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