First Gear (Engine Brake Operation Not Possible)

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Each shift solenoid is set to first gear (engine brake operation not possible) mode. The pilot pressure is applied to the bottom end of every shift valve and each shift valve is positioned on the upper side. Line pressure (1) is applied to the low clutch passing through shift valve B (oil passage (35)). Line pressure (5) is applied to the reduction brake passing through shift valve B (oil passage (34)).

Fig 1: Identifying Shift Valve A, B & C
Courtesy of MAZDA MOTORS CORP.