car goes into trans failsafe mode sporatically...it does not stay in third or fourth gear...it shifts through all of the gears and downshifts through all as well. It shifts relatively hard. Sort of a luck of the draw type thing...one time yes with tfp message, next time no message...crap shoot. read a lot here...battery sticker says 2006 so battery is aged. standing voltage is a little low. Any help...greatly appreciated. when light is not on...car shifts as smooth as glass.