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Home >> Chevrolet >> 2018 >> Suburban 3500 HD LS >> Repair and Diagnosis >> Transmission >> Hydraulic Diagrams >> Automatic Transmission - 8L90 (M5U) - Description And Operation >> Description And Operation >> Drive Range, Third Gear >> Notes

Drive Range, Third Gear: Notes

As the vehicle speed increases, the transmission control module (TCM) receives input signals from the automatic transmission input and output speed sensors, the throttle position sensor and other vehicle sensors to determine the precise moment to command OFF the normally-high 1-2- 7-8 reverse control solenoid. At the same time the 1-3-5-6-7 control solenoid is also commanded ON to regulate 1-3-5-6-7 clutch apply.