I was leaving work today, and noticed a hose dangling under the truck. Its definitley a vent hose, and the vent is mounted to the top passenger side of the bellhousing on the tranny. I assumed it was the front diff vent, but after crawling under the truck tonight the diff vent is intact.

I recently had the tranny worked on, and it looks like the mechanic didnt move the clamp back down, as the clamp is about 4 inches from the end of the hose.

Anybody know where it goes? I'd rather stick it back on then spend a hour at the dealer letting them fix their own stuff.

 

Not 100% sure on your 06, but on a 2nd gen truck, it sounds just like the transfer case vent hose. It goes all the way over the transmission to the bell housing on the passenger side.

 

That could be it - its definitley long enough.