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BOOST VALVE The boost valve (Fig. 44) provides increased fluid apply pressure to the overdrive clutch during 3-4 ACCUMULATOR DESCRIPTION The accumulator (Fig. 46) is a hydraulic device that has the sole purpose of cushioning the applica- Fig. 44 Boost Valve Before Lock-up Fig. 45 Boost Valve After Lock-up Fig. 46 Accumulator 1 – ACCUMULATOR PISTON Fig. 47 3–4 Accumulator and Housing 1 – ACCUMULATOR PISTON 21 - 38 42RE AUTOMATIC TRANSMISSION WJ DESCRIPTION AND OPERATION (Continued) |