Checking & repairing a differential vent tube when troubleshooting a leak (Part 1 of 2) Tahoe
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- čas přidán 7. 12. 2015
- This part 1 of 2 DIY video shows how to overcome a clogged vent tube on your differential. In my case, repair of the original vent tube was too risk and of course I did not want to drill into the differential housing to install a new vent. The video shows one way of overcoming this challenge.
Vehicle 2001 Chev Tahoe, rear differential shown in video... but the principle applies to any differential with a vent tube. - Auta a dopravní prostředky
You can buy the vent at the dealer and it only takes a hammer and chisel to pop it up and out. It's just pressed into the top of the differential. Knock the new one in with a small deep well socket so you don't damage the nipple. Hook up the factory hose after you blow through it and make sure that it is clear and not clogged up which would cause the pressure in the differential to start pushing oil out of the seals.
What a great idea. An innovative and practical solution to a problem that would otherwise be difficult to address.
my vent tube is on the top side of my Rav4 Diff and is all but impossible to get to and rusted in place, this actually might work with the fill plug, thanks for the idea!
The only problem I see is that the vent is really close to the ring gear where fluid is getting flung around & could get into the vent a lot. I suspect that is the reason the vent is usually farther outboard on the axle. Just a thought.
Awesome idea....thanks 👌 👏
Damn dude I would have gone another 10 years without looking at that I've already put 300,000 on this Ford
Stop clicking your pen
😆
When a vent line is Clough the diferential locks to positive and wear out your front tires and also makes it hard to make steer.
That's genius. My hummer has done the same and I've searched all of the web for a replacement with no luck. Looks like I'll be doing this and Damn you GM for making shitty parts.
my question....where does the vent tube go to. I found my hose just laying on top of the front axle, and just pulled it out from over the transfer case
That galv. pipe in the filler will not work. When the fluid heats up it expands and covers the filler hole, sealing the diff. just like a clogged breather tube. Pull the rear cover, remove the clogged breather port and install a new port, new tube and a one way valve on the high side of the breather tube.
Very interesting point. I agree that my fix will cause fluid to push out the galvanized fitting and up the vent tube as the fluid heats and expands. This is in contrast to the original design that only pushes air up the vent tube. However, I'm not at all concerned since the fluid won't expand so much to overflow the tube (it is a couple feet long) and also since all the gears will be as covered in oil as they need to be. I haven't had a single problem since implementing this work around.
Jekyll & Hyde Garage hey bro, you seem to know alot about this. I'm having an issue I hope you can help with! I have an old Chevy S10 I cut in half and made into a trailer. I flipped the axle upside down to basicly lift it and shove 35 inch tires underneath it. I closed the old breather tube and did basicly what this guy said to. My problem is I have diff fluid coming out the end of my hose. (6 foot of hose I put up high). Why would it he causing so much pressure to travel up 6 feet of hose? Please help! Thanks.
Joe Cuevas because your breather hose is below the oil fill level where this guy's breather hose is above the fluid level
If fluid fills the breather plug assembly, how does it breath ?
That was my issue on my 89 chevy k1500
Wtf is that clicking noise
Air compressor
His camera auto focus
Knee?
😂😂
Shouldn't it have a one way valve to keep the diff from sucking moisture in?
+pinfarmer
the fitting into the differential was not a 1 way valve. it is possible there is a 1 way valve at the end of the original rubber vent line up near the gas filler neck. Since I reused that hose, I have returned it to "stock function".
mr diyguy123
you don't want a one way valve. as the diff and oil cools, air needs to reenter the diff.
if you're worried about water entering the tube, extend the tube higher towards the bed/body. (such as in off road instances) to keep the end away from water.
another poster is right, you want your vent tube higher than your oil level would be. if you put the vent near the fill plug, as the oil heats and expands, it will outflow through the line and when you cool off, your diff will be low on oil
how long does plumbing tape last exposed to differential oil? great video
Good question. I don't know the answer. It isn't leaking after 5 months but I will keep an eye in it. The teflon tape is as much to make future plug removal a breeze as much as it is for sealing.
Teflon is tough stuff.
Not a terrible idea but the biggest problem is that galvanized pipe & fittings dont last very long. Especially exposed to the elements and depending on where you live salt and snow that pipe will rust and break off with the vibration of the road in less then 5 years and then you will need a new differential not just a new breather. Great idea, bad solution!
Ask the Chevy employees who are laid off
What is the danger of filling oil to the level of the fill plug?
More pressure on your seals. Premature wear. Same as your car engine.
Wouldn't it be easier to just use a tapout or weld a nut to the old fitting. Pull it out put a new fitting on it then buying all that pipe? Fittings don't cost much.
hell yeaha..lol
Lol