[dagoberto]

I was going to take it out for a drive today and as soon as I put it in gear, my oil pressure drops immediately to zero. I just changed the oil and with the dipstick it says that it is full. Any idea on what could be the problem? When I put it back into park it does to normal again.

 

[imported_karsten]

replace the oil pressure switch and see what happens before you worry about anything else.

 

[felan]

check iol presser switch first . fords rods an main berring hold oil presser. so with high miles on motor wear in berrings . oil light would come on at a idal . on chevys cam berrings hold oil presser . . so if bearings on fords . have on old fords drop oil pan an put new standrad rod an main berrings in an cured up this problim . an what weigh oil did you use 10w40 is good

 

[boothe]

change the oil sending unit first. if it still does it then it could be a weak oil pump or a rod bearing.