Chevrolet Equinox manuals

Chevrolet Equinox Service Manual: Drive Range, First Gear Automatic Transmission Unit

Chevrolet Equinox Service Manual / Powertrain / Transmission/Transaxle / Drive Range, First Gear Automatic Transmission Unit

As the vehicle speed increases, the transmission control module-(TCM) receives inputsignals from the automatic transmission input and output speed sensors, throttle positionsensor and other vehicle sensors to determine the precise moment to deenergize or“turn off” shift solenoid-1 and command OFF the normally-high R1/456-pressure controlsolenoid-3.

Low & Reverse Clutch Releases

Shift Solenoid 1

When shift solenoid-1 is “turned OFF”, CSV2 enable fluid from the clutch select valve-2passes by the #2-ball check valve and enters the solenoid-1 fluid circuit. Solenoid-1fluid from the #2-ball check valve and TCC regulator valve is then routed to the solenoidwhere it exhausts.

Clutch Select Valve 2

Clutch select valve-2-(CSV2) enable fluid is exhausted from the clutch select valve-2and clutch select valve-2 spring force moves the valve to the released position. Withclutch select valve-2 in the released position, drive fluid from the manual valvepasses through the valve and enters the drive-1-6 fluid circuit. Drive-1-6 fluid thenfeeds the R1/456 and 35 reverse clutch regulatorvalves and the TCC regulator valve.

R1/456 Pressure Control Solenoid 3

The R1/456 pressure control solenoid-3 is commanded OFF allowing PCS R1/456 fluidfrom the R1/456-clutch regulator valve and 456-clutch boost valve to exhaust.

R1/456 Clutch Regulator Valve

R1/456-clutch regulator valve spring force moves the valve to exhaust the R1/456-clutchfeed circuit and allow drive-1-6 fluid to enter the PS4-fluid circuit. PS4-fluid isthen routed to the normally-closed pressure switch-4 and opens the switch. PS4-fluidis also routed to the #4-ball check valve and flows into the CSV2-latch fluid circuit.

#4 Ball Check Valve

PS4-fluid pressure seats the #4-ball check valve against the 456-clutch fluid circuit.PS4-fluid is then directed into the CSV2-latch fluid circuit and routed to the clutchselect valve-2. CSV2-latch fluid combines with clutch select valve-2 spring forceand holds the valve in this position during all 6-forward gear ranges.

#5 Ball Check Valve

Drive 1-6-fluid pressure seats the #5-ball check valve against the 35-reverse clutchfeed fluid passage. Drive 1-6-fluid is then directed into the 35R-supply fluid circuitwhich is routed to the #7-ball check valve and orifice-#16.

#7 Ball Check Valve

The 35R-supply fluid seats the #7-ball check valve against the 35R-feed fluid passageto force 35R-supply fluid through orifice-#16 before entering the 35R-feed circuit.The 35R-feed fluid is then routed to the 3-5-reverse clutch regulator valve.

Low and Reverse Clutch

Low and reverse clutch spring force moves the low and reverse clutch piston whichforces R1-fluid out. R1-fluid is routed to the clutch select valve-2 where it entersthe exhaust backfill circuit. The low and reverse clutch is in the released position.

Drive Range, First Gear

Drive Range, First Gear Automatic Transmission Unit

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