Good friend ... I have a problem with a Ford F150 FX4 in 2006 ... just after repairing alternator,the transmission began to fail... it a shifts from first to second but does not shift to third or fourth .... it remains as neutral ... I have to turn off the O / D drive to ride ... the strange thing is that there's no light on the board and I sent it to scan and gives no error code .... Greetings