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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, Sixth Gear >> 2 - 3 - 4 - 6 - 8 Clutch Applies

2 - 3 - 4 - 6 - 8 Clutch Applies

2 - 3 - 4 - 6 - 8 Control Solenoid 

The 2-3-4-6-8 control solenoid energizes allowing line fluid to enter the S4 VFS SIG fluid circuit which applies pressure against the S4 vfs accum spring force and against the 23468 control valve spring force. This allows 13567 CL/23468 CL FD fluid to enter the 23468 CLU fluid circuit. 13567 CL/23468 CL FD fluid also passes through the 23468 control valve orifice #39 into FDBK. 23468 CLUTCH fluid is directed to the #10 ball check valve and through orifice #44 to the 23468 clutch assembly housing.

2 - 3 - 4 - 6 - 8 Clutch Assembly 

The 23468 CLU fluid passes through orifice #44 continuing to the 2-3-4-6-8 clutch assembly housing. 23468 CLUTCH fluid applies pressure against the 23468 clutch piston which applies holding pressure to the 2-3-4-6-8 clutch plates.