The hose is already there & routed up to the bed floor cross member. This cap is on the top end of the hose. So all you'll need is to clean the felt out of the existing vent cap, or put some type of fuel filter on the end instead.
This is what I put on the end of my vent hose. In the old days we used them on the old bugs and called it a VW fuel filter. This one was called a universal fuel filter with 1/4, 5/16 fittings. Good friction fit on the end of the hose.
Great research and thanks for sharing...appears to be a gore-tex membrane based on that stamping....yeah that will only "breathe" at the microscopic level and for this purpose that almost means no venting. Seems like some engineer really thought they had a brialliant idea here while they were staring at the North Face jacket on their chair.....and designed this to be capable of full long term submersion while not thinking of any back pressure. Definitley going to poke a few holes in mine at a bare minimum. Thanks!If you hadn't happened to see it before, check out my earlier post on page 5, #74 of this thread about the restrictive vent hose cap on the rear axle.
After discovering this restriction, I had been running the truck with the vent cap assy. completely removed from the axle vent hose for about three weeks & approx. 1,000 miles until I could get it into the dealer for the seal repair.
Coincidentally the leak almost completely stopped during that time frame. It never did actually drip onto the backside of the wheel, so for whatever it's worth, I believe this restrictive vent is a major contributor to this rash of leaking rear axles.
Just got my Mojave back from the dealer yesterday after they replaced the axle shaft w/bearing & seal assy.
Before reinstalling the vent cap last night, out of curiosity I opened it up again to see about cutting a slit in the paper membrane to allow easier venting, and hopefully prevent any future leak issues.
The picture below is a new discovery that the body of the vent is packed, and I mean VERY tightly packed with a heavy felt material.
It's no wonder that it's almost impossible to blow, or draw any air through the rear axle vent hose. All I can figure is they did this in case you would drive through extremely high water to prevent it from flooding the axle housing.
Since I have no plans on installing a periscope, and converting my truck into a submarine any time soon, I removed all but a very little of this heavy felt from the vent cap.
Now it will pass vented air as it should when the gear lube expands & contracts from thermal cycling when driving. I feel pretty certain that this will eliminate any future seal leakage from pressure buildup. We'll see.
Are we certain that the Gore Vent is causing the issue, and it's not an axle assembly problem? When I installed my Dana chromoly shafts, I thought the shaft and seals were seated well on the passenger side, but then I felt resistance when tightening the bolts before it slid in another 1/8" or so. I was worried that I could have damaged the sealing lip, but it hasn't leaked. The only time much volume of air might need to pass through is when a hot axle goes under cold water, and that would cause the opposite of an oil leak if the air couldn't pass quickly enough...water intrusion.
I never claimed that this vent issue was "the" definitive cause of these leaks. But common sense would indicate that at the very least, it is most likely adding to the problem.
I understand why the axle is vented. The changes in pressure as the axle heats up and cools down when driving are gradual, and the Gore Vent should allow for that. The rapid cooling when a hot axle is submerged is the only time any volume of air has to pass through the valve rapidly. It seems that the passenger side is more prone to leak. Why would that be if it was the vent causing the problem?
I was kind of amazed to see the gore vents posted above and it still seems like overkill to me....but I too have been wondering why it seems to be overwhelmingly the right rear. I was leaning more towards either a defective batch of gaskets at Dana or an assembly line issue at Dana (either mechanical or human error) damaging the original seal when the shaft was inserted for the first time.
I am 99% sure they are not and tat the same axle shaft assembly can be installed on the left or right side.
Lift installer should check for the need to relocate the breather tubes, based on suspension articulation.For what it's worth I saw this like 6 months ago before going to work and had to put it back on. Has this happened to anyone else?
What is the MDH#(sticker inside driver door frame M=month, D=day, H=hour ) of your truck?
