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I have a '99 7.3 with a superchip & Kn filter are the only mods. It has 184000 miles. whenever i put the trans in reverse it will rev up & down on it's own & idle real rough & sometimes die. It will start back up & run perfect in drive,park or nuetral but always runs real bad in reverse. Any suggestions?
Stall when engaging transmission (automatic, usually manual low or reverse):
Torque Converter Clutch.
This may be caused by the TCC being engaged at idle. On trucks built before 9-20-95 the correction is a new transmission front pump and/or torque converter. On trucks built after the above date, it could be cause by a loose transmission filter. In this case, install a flat magnetic strip (from a Tempo ATX or Ranger A4LD transmission) in the trans pan below the filter pick up to retain the filter in place or use an updated filter from Ford that has bumps cast into the plastic to help it stay in place.