1990 Ford F150 Transmission
The engine oil sending unit has nothing to do with the transmission problem you are facing neither does a drained battery,If the transmission fluid was low it will neutral out at idle and only engage very harshly when warm,so the level is ruled out,That dole valve noise is of concern that can be the transmission pump or the torque convertor,Just out of curiosity,the transmission pan its not smashed up is it?This is a long shot remove the transmission pan make sure the trans filter did not pop out.And since you have the trans pan out see if there is shiny brass or metal shaving in the pan if there is you are dealing with a internal transmission failure
Hi Anonymous, I want to help you with your question, but I need more information from you. Can you please add details in the comment box? how loud is the noise -- is the noise constant, never stops, only occurs when idling or does it occur while driving, is it simply a vacuum noise or could be wherring noise or a Fan blade noise? as much detail as possible.
need more details on your problem if you can tell in detail about your problem and what led up to you thinking this was what was going on i will do my best to get you headed in the right direction thanks
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