Low oil pressure after vehicle is hot, but no noises.

You should have a oil pressure test done to make sure but since not tapping may just be a bad sensor that screws into the engine block that goes the the oil pressure gauge.

Well last night on way home it dropped to the line right at the edge of low and it didn't leave there most of the way home. It has proper oil level. After it had cooled I started it again and now it starts at only half way on gauge instead of at 3/4. It is getting worse, but it still hasn't dropped low enough to have any bells or light for warning of low oil pressure. I have been tol oil pressure sensor, oil pump, leak which it is not loosing any oil, and oil screen sludge or wore internal parts. How can I find out for sure which is the actual cause. I know the sensor can be tested with a pressure test and the screen, the pan can be dropped, but how do I know if it is the oil pump or wore out internal parts without tearing the whole motor down?

I have a dodge durango 2000 i got all my stuff fix but it when turn over but it what start so please tell me what go on

Make your concerns known to the dealer in writing before they decide that it has been long enough that they wash their hands of the car.

My 2002 dodge durango is in the shop right now (4.7 4wd). same condition, when engine is warm and driving oil pressure is high, when come to stop light, it goes to 1/4 b/f low pressure (not all the way down to 0 thank goodness) . i took it to shop to have them do a mechanical pressure test. Ill share results. This was a good video (just so happens to be a dodge durango ) https://www.youtube.com/watch?v=qu3QbvOvVNE