Transfer Case rocking/Shudder??
 

Brand new to this forum. Anyhow I recently bought a 2000, f350, DWD, 4x4, Manual transmission, with an 8ft bed. I have noticed that when I am starting off slow, while NOT in 4wd, and I push in the clutch there is a 4-5 sequence shudder that sounds like it right under me. It does not happen at speeds over 5mph. I had a friend do it as I laid along the running boards and it sounds like it is coming from the transfer case. When the clutch disengages the drive shaft rotates back and forth 3-5 times and it sounds like a rhythmic bumping in the transfer case. Had a fried tell me that it was probably the tranny mount but I checked and it has good rubber and is really tight. i would appreciate as much input as possible.

---AutoMerged DoublePost---

Also, it is usually only when pushing in the clutch abruptly.

Sounds like the clutch is grabbing...

I have the same noise coming from my 2001f- 250, I do not know what it could be, and I don't know if it will mess up my transfer case

Once again.. it only happens in low gears, reverse, low, and first. Does not happen in 2nd through OD. Very annoying.
:argh:

Again... It sounds like the clutch or throwout bearing...