04 f-150 clunk/click while driving in 4x4

[mslv1320]

Any one else have this problem, this rig has 86k on it, put it in 4 wheel high it, it goes click click click, not a real hard clunk, but fairly loud click click click

[moparmikefloyd]

i would say to check out your u joints on the driveshaft, the front drive shafts, there are joint at each wheel and a shaft from the transfer case to the front end, if you change them your self you may need acetiline torch, the originals are sealed so you cant grease them, when the grease dries up you will hear the clicking, and may hear a ping with the brake on going from reverse to drive