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I was just under my 2000 F250 7.3l crew cab truck ang noticed a small diameter rubber hose dangling from my front drivers side brake housing area. It is attached near two other cables which are similiar to cables on the passenger side. I dont see a similiar hose on the passenger side. The hose is completely deteriorated and broke off up higher towards the engine. I cannot see where it goes.
Is the truck a 4x4? If so, it may be a vacuum hose that actuates the front locking hub. Look for the nipple on the top of the steering knuckle where it should slide over.
Is it a hose, or a cable?
Or perhaps it's actually a tube. Usually when somebody sees a rubber tube that they can't identify, it turns out to be a vent tube for the axle.
These tubes are connected to the axle and then travel to a fairly high point and the end is clipped in place in a 'U' shape. These tubes prevent pressure building up inside the axle and blowing out grease seals, but are placed in such a way as to prevent water from getting in the axle when it is submerged.
I bet you are right. I haven't had a chance to crawl back under to check, but I do remember thinking it looked like the hose doubled back up by the engine.
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