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You are likely to get an oil 'mist' from a vent or breather tube -this is quite normal. The 'mist' cools around the breather and forms a small oily patch. on the axle casing.
Are you certain that the oil is coming from the vent tube and isn't due to a split in the metal casing or from the gasket/seal?
How much oil are you losing? The only other way you would lose oil is if excess pressure was building up inside the differential and to be honest, it's difficult to see how this would occur unless it has recently been over-filled with oil.
If there are drips of oil appearing on the ground underneath the axle/differential chances are that it's the cover seal or the pinion seal at fault. The pinion seal is where the driveshaft/propshaft attaches to the differential. The cover seal is the gasket between the metal cover where the filler plug is and the differential casing itself.
sounds like it is overfilled and/or you crankcase ventilation system is not working and pressure is pushing oil out. Clean replace PCV valve, ensute system can breath.
An air breather replaces the intake vent hose on your crankcase, which vents the spent gases inside your head out into the atmosphere instead of back into your intake track. This keeps your engine clean and in top condition. Aside from that, air breathers also improve the appearance of your engine bay.
Installation of an air breather is a simple process that takes minutes. Simply remove the hose on your crankcase and replace it with this breather. Most breathers come with a clamp already included.
Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.
The breather hose goes to the inner frame on the drivers side.You can attatch it to anywhere as long as it is high enough with slack in the hose for suspension travel.
thanks,ramundoo
Good Evening, I have never seen one go up to the filler neck due to the idea of fuel and the rear diff breather hose really would not do good breathing in vapors. Last time I saw one it was secured to the inside of the frame other times it is just secured to the underside of the bed framing.
This hose you refer to is the breather tube for the differential. It connects to a fitting at the top of the differential housing and runs up the back side of the radiator so you won't run the risk of water entering the differential if you submerge the front axle in water. Reconnect the rubber hose to the fitting on the differentail.
On top of the valve cover there is a fresh air breather unit. Make sure the breather unit is not plugged. Also the fixed orificePCV should be clear. Find a tool that will go through the orifice and make sure it is clean. Remove the vacuum hose and check it for cracks or internal damage. With the engine running, make sure you have vacuum through the hose. Let me know when your finished cleaning the crankcase breather system. Regards,
Thats is exactly what it is. It allows the front diffrerential to relieve pressure when fluid warms and expands. Just make sure it is not in the way of steering components and wont get pinched by suspension. All is well.
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