Ok try this one on for size, I was changing my serp belt, the one for the A/C! ( A royal pain in the rear!) and found this vacume tube just hanging from behind the radiator shroud. So I looked arround and couldn't for the life of me find ware it came from or went to! I then pulled it out and it was worn with holes and gouges. Well now I found my 4x4 wont engauge in auto. So I have reason to think that went to the vacume system for the 4x4. could I be right? and dose someone have a pdf for the vacume system so I can trace this?