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2001 Ford F-150 Questions

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I need to change a bearing and I have been trying to find out if it is any different than the rear ends with gear oil in the rear end. Also I was wondering if the graphite gets old and should be changed or is there something that can be added to it.
every time it rains the rear window leaks
OIL PRESSURE GAUGE NORMALLY IS ABOUT 2/3 THE WAY UP THE HIGH PRESSURE SIDE. OCCASIONALLY IT WILL RAPIDLY DROP TO 0 FOR 10-15 SECONDS THEN RETURN TO NORMAL. IT HAS ABOUT 155,000 MILES ON IT. NO ENGINE KNOCKS OR TICKS.
Headlights randomly shut off when it is driving or running for 25 minutes or longer
I have checked my fuses, and I do Fuse 8(5A) that continues to blow. I have replaced several times, and can't figure out what is causing this issue to happen. I have done searches online and can't really find any answer. Does anyone have any idea what this could be? I have noticed that my front windshield is leaking, so this could possibly have something to do with the problem...but I'm not sure.
When i turn the truck on the odometer goes off but about 10miles down the road it'll come back on why is that
I swapped motors with a 1999 f150 it went in fine but now it won't start and the anti-theft light is on and flashing, it cranks and cranks but just won't start. I've read on here that's it might be the fuel pump relay fuse, where is the fuel pump relay fuse at? Also read that it might be Fords PAT system, what exactly is that. Oh, and I locked my keys in it the other day and I used a slim jim now I can't unlock the driver side door, And that's the door I used the slim jim on. Can you help me out?
I have changed fuel pump an filter coil pack's over drive button hope u can help
The engine should be starting in high idle due to engine being cold.
Truck has been starting at approx. 600 rpm even though engine is cold.
Approx. 3-5 seconds after 600 rpm start the engine will migrate to a regular cold start RPM of approx. 1200.
Hi, we have a 2001 F150 Supercrew (5.4L) & we just had to change the battery. When we put the new battery in the lights, radio, etc worked but the truck will not start. Won't even crank- just silent. Anyway, years ago we had a similar issue after taking the truck to the Ford dealer for some work (where they had to disconnect the battery to do the service) and later that day we had the same problem. The service mgr actually came to our house and pulled the battery cable off for a few minutes and then said to hit any button on the remote with-in 5 seconds of him reconnecting the battery cable (which I think was the negative cable). Anyway, that worked then but doesn't seem to be working now. This all started because the battery wasn't going above 11.5 volts even with the engine on so I went to get the battery tested and the auto store just gave me a new battery. I know this has to be related to the PATS system
How long have you had this problem? 1 day
Whenever I stop accelerating the vehicle shakes until I come to a complete stop
Noticed it was losing power going up a steep hill on freeway. It runs, not freeway safe. Had all the fluids topped off, oil changed, new oil filter and air filter, could it be the fuel filter>
I've replaced fuel pump, fuel filter, battery starter, crank sensor, 2 PCM, engine wiring harness with fuse and relay box all in one, it will fire when spray starting fluid in the throttle body and it will try to start and if put enough it start for a second. It's spark and compression but the injectors are not working I put noid lights on and the lights never flash I have purchased two cam sensors and not replaced them yet because it's showing an electric pulse so it just want start anyone know anything about it.
The PCM twice and the fuel pump and fuel filter and crankshaft sensor the engine wiring harness with fuse and relay box. Starter and battery alternator and. But it's been sitting for over a year the steering column antenna for the PATS security system. And it will try to start if you spray starting fluid in the throttle body. I got 2 camshaft sensors. I haven't put on yet. It's firing and compression but I think the fuel injectors are not firing. I need help I'm just doing the shade tree mechanic I've been just replaced piece after piece and the locksmith has been out 3 times.
Hi there, I am a novice, I had trouble with my truck. It turned out to be the PCM. I had it replaced at an auto shop. They said that the PCM was flashed to my VIN, (whatever that entails) The problem now, it thinks it is being stolen. The only reason I know this is due to forums and advice from other mechanics online. I went to pick up my truck and it was fine, Until I drove home for the day and activated the alarm. I turned on the alarm with my key fob. Went back out, no start. the anti theft light is flashing rapidly..... the mechanics say there is nothing more that they can do. Or should I say they are refusing to help. They say I need to take to ford dealer. Considering I just spent two paychecks on the replacement of the PCM, I am broken hearted that they have taken advantage of me. I can only start my truck if I never ever use the alarm/ the fob (which is brand new because I thought it was the issue) or the keyless entry. Once any of those are used the truck thinks it is being stolen. That anti theft light starts flashing rapidly and it kills the start. I am asking What I should ask for? I can not afford to be bled to death of money, that I quite frankly do not have.
I can get it to start again by taking the negative off the battery and waiting for 10 minutes. Reattaching it, and it starts and runs soundly.

Please advise
Do I need to replace egnition? Would that circumvent the problem or introduce even more.
Do I need new keys? (I replaced the fob and had it done by a lock smith that deals with these things) Please keep in mind that I am a little older and had back surgery and I am limited. Takes me a while but I get it done. I am going to have to try to do it myself.
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