on my 04 i was going to get fire wood in 4wd at my parents this past weekend, was just fine, ive been using 4 wheel all winter with no problems, loaded some wood and went into drive to leave and i started spinning a little then i had a loud clunk in the front end some harsh gringing and then no more 4wd. i checked the tcase and thats fine, still shows it goes into 4wd on the dash, i looked underneath and cant visialy see anything broke so something internal. any ideas from anyone who had this happen as to what it could be in the front end that broke? thanks

 

Sounds alot like the issue I just had and solved. Check out the thread I posted here on the forum and let me and everyone else know if it helps you narrow your issue down!.

https://www.f150forum.com/f4/4x4-not...-sound-240808/