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Home >> Chevrolet >> 2019 >> Cruze Premier, 4D Hatchback >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Automatic Transmission - 9T50 (M3D) - Description And Operation) >> Description and Operation >> Drive Range, Sixth Gear (Hydraulic Circuits) >> 1 Reverse & 6-7-8-9 Clutch Applies

1 Reverse & 6-7-8-9 Clutch Applies

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1 Reverse & 6-7-8-9 Solenoid 

The 1 reverse & 6-7-8-9 solenoid de-energizes releasing pressure against the 1 reverse & 6-7-8-9 regulator valve spring force. This allows LINE fluid to enter the 1 REV/6789 FEED fluid circuit. 1 REV/6789 FEED fluid is routed thru orifice #40 to the latch valve and to the clutch select valve.

Latch Valve 

1 REV/6789 FEED fluid is directed into the latch valve applying pressure against the latch valve spring force. This blocks DRIVE 2 fluid from entering 1 REV/6789 LATCH fluid circuit.

Clutch Select Valve 

1 REV/6789 FEED fluid is routed thru the clutch select valve into the 6789 CLUTCH fluid circuit. 6789 CLUTCH fluid is directed thru orifice #42 and to ball check valve #5 and the 6789 clutch assembly.

#5 Ball Check Valve 

6789 clutch fluid seats the #5 ball check valve against the 1 REV/6789 LATCH fluid circuit allowing 1 REV/6789 FD fluid to enter the LATCH fluid circuit. LATCH fluid is directed to the clutch select valve applying pressure with the clutch select valve spring force.

6-7-8-9 Clutch Assembly 

6789 CLUTCH fluid seats ball check valve #6 then forced thru orifice #43 and #36 to the 6-7-8-9 clutch assembly. 6789 CLUTCH fluid is directed into the 6-7-8-9 clutch piston spring force which applies holding force to the 6-7-8-9 clutch plates.