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129 0505 Tran 12 Z

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Aftermarket parts are available to tweak a TH700 to your liking. Clockwise from top are a TV plunger kit, Corvette-style, that prevents part throttle downshift in Fourth gear; a servo release "check valve," providing a quick release for the Second gear bands and a faster apply for the 3-4 clutches; and lastly, a boost valve that offers a larger boost fluid area, and is O-ring sealed for leakage prevention.