NEED HELP!!!!!!!

[LPstroker]

I need your help. 2003 F250 7.3L 4X4 Auto, Terrible rattling noise when I start moving. Doesn't matter how slow or hard I leave the line. Only does it when moving. It sounds like a licking or rattling noise. It seldom does it in reverse. Has me stumped. Got any Ideas?

[vitalidle]

Where about do you think the noise is coming from?

[LPstroker]

It's tough to say, I would say from under, more towards the rear. Here is some more stuff I noticed. Only does it under initial load, Under 2K RPM. I'm thinking it's a u joint, but the thought has crossed my mind that it could be more.

[vitalidle]

Hmm yeah crawl underneath and give it a good inspection. Might want to check your rearend fluid level also. Who knows maybe its just somthing loose underneath

[sevenmalards]

Tough to say. Same thing happened to me a couple years back. Not a PSD though, it was a 2001 Silverado, and it was the pinion gear bearing.

[LPstroker]

Yea I brought it up into the shop and put it up in the air. I didn't see anything loose. I rotated (until they wouldn't move, then back in the other direction) the tires by hand while it was in park and didn't hear anything unusual. The movement in the drive shaft before the tires move felt normal. not to much slop in it. I really hope it's not my torque converters or something. The fact that it's a clicking noise and it only does it under initial load leads me to believe its the u joint.

[vitalidle]

Could be a U-joint. Usually they will squeak when they go bad.

[LPstroker]

No this is a really bad clicking noise. I pulled a trailor last night with a pretty heavy tractor on it and it was really loud. I also have a vibration at highway speeds.

[460+]

Look for rust color around ujoints,might recheck joints with trk in neutral easier to find.

[hondo997.3]

i had something similair when i put on my lift. my carrier barrings went out