Just started a few thousand miles ago...only happens when i am driving. Sounds like a rotational squeak in the lower gears and when shifting into reverse.
Happens erratically, I would say more often than not however.
Any ideas
I am thinking maybe throwout bearing @ 30K miles? can that be right?

 

is this squeek after you are moving or sitting still?

 

the truck has to be running and it is anytime I push in and/or release the clutch,
only then..not when I am in gear though, no noise after the tranny is fully engaged