i had recently bought the truck, a month to be exact. its not lifted, there is a receipt in the dash saying the t-case was rebuilt. so maybe thats why its missing the dust boot.
the reason im wondering is because the truck has a slight grinding noise when in gear (nv3500) its disappears when i press in the clutch. sometimes it noisier than usual, i usually pump the clutch a few times and it makes it less noticeable.