Started engine; starter stayed engaged,dicnnected battery/turn key off,

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Replaced starter/solenoid; started car/it shorted out igniyion switch. Replaced ignition switch/shorted again. replaced ignition switch/ install starter button to start car/ works fine. Test drive car auto trans will not down shift from dr. to low to srart 0ff also will not upshift to overdrive. manually shift to low/reverse works;if put into drive from stanstill/remains will not upshift or down shift. When you let off gas pedal car free wheels but will not go into overdrive or down shift.