Hi guy's. New here, was looking for a place to get some info.
My Dad has a 01 f150 xtended cab 5.4 auto. Some of this info is second hand. He had driven it on a trip about 50 miles,when he started it to return he said it did not want to engage, put it in gear and nothing happened. Messed with it a bit and got it to go. was fine for about 30 miles or so. Then it started to make noise. I trailered it home and drove it a couple hundred yards to the shop. It sounds like a very large, very dry bearing, also seemed to catch/lock up then clunk. With the wheels off the ground you can kick it into neutral and while the wheels are still rolling it quiets down. Also it does it sometimes while in neutral. When it is in park it sounds like stuff is still turning. At fist I thought wheel bearing or rear end until it made noise in neutral and park. The noise in park is not loud, just sounds like things are turning. It is full of fluid. The tranny has always worked flawlessly and still does even with the noise. Any idea where to start looking? Transfer case? TIA

 

I'd start looking with a mechanic's stethoscope to see just where the noise is coming from.

I'd start looking with a mechanic's stethoscope to see just where the noise is coming from.

I'd start looking with a mechanic's stethoscope to see just where the noise is coming from.