Well I took it into the shop today and my pulleys, tensioner and belt are fine. They listened with a stethoscope and said it is most likely a bad lifter or a bearing towards the rear of the engine. Suggested i run a heavier weight oil. What do you all think of this diagnosis?
I been reading on the site and does the 4.0 OHV have a cam symchro? Since that could cause the same issue also. I think? No check engine light.

 

Sorry, not versed enough on the subject to be of help.
I do know that my 5.0L used to make lifter noise if I ran 10-30 oil instead of the 5-30 suggested by Ford.
I make sure on my 3.0L that I run the right stuff just in case; so it sounds like there might be a problem.
R U running the correct weight oil now ?

 

I'm in the same boat asyou as i do not as much about internal engine noises and the cam.
I currently run 5w 30 but now I'm running 5w 20 to help with the chirping. So far ok. Going to Seafowm tomorrow and add some Lucas to it. They suggested i run diesel oil but i do not know if i should or not. Just hoping it goes away so i do not have to replace the syncro.
Thanks for your help, I'll keep this thread updated as i go.

 

The larger alternator is capable of charging more but it won't ever be maxed out like a smaller one. Kind of like having more gas in your tank than you'll ever need.