i have an 05 crew. in the past month i have had my truck shut off all by. while going from a stop to a turn. It started righ back up. i know i tend to play with the button on the shift handle(automatic). just yesterday the noise started out of the blue. i have hit not or ran over anything. it kinda sounds like a rattle when in gear and accelerated. what should i start looking at 1st. maybe fan belt. Doesnt do it all the time. it kinda is sluggish also. i hear it even when in neut.