Forward Drive Ranges

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While in the forward drive range, accumulator control pressure (21) is applied to the bottom part of the accumulator control piston and pushes the piston upward. When shifting up to third gear, line pressure (44) is applied to the high clutch and the high clutch accumulator. When line pressure (44) is applied to the upper part of the accumulator piston, the piston begins to move downward. While the piston is moving, line pressure (44) is pressurized gradually and the shock from the high clutch locking will decrease.

Fig 1: Identifying High Clutch Accumulator Operation
Courtesy of MAZDA MOTORS CORP.