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Gear oil out the vent tube.

chevellian said:
Had the same issue.
My problem was I ignored the part in the directions where they tell you to grind a channel in the lower part of the bearing counter bore on the drivers side.
This channel will let gear oil that has flowed into the drivers side axle tube flow back into the differential since the ARB air actuator blocks oil from flowing through the carrier bearing. Not the greatest design imo.
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Very interesting...

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Ground a small channel on both sides at the bottom of the tube. Ground it down flush with the inside on the pumpkin.

2 hour road trip Friday to see if it's fixed. Driving to and from work doesn't make it puke.

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Now it pukes worse than before. Added the recommended 2 quarts of gear oil and now it pukes even just driving 8 miles to work.

I give up. Bitch is just gonna puke gear oil. I'll keep an eye on the level and add as needed. 🤡
 
ad a expansion chamber to you vent hose. plastic fuel filter works good . it will let the oil drop from the flow
 
run a vent hose that goes up as high as you can(upper shock mount probably) then half way back down to the axle, i do this to all my axles, added bonus is even if you submerge the vent it wont fill with water.
 
Okay. Based on all the feedback, I ran the vent hose as high as I could, put a loop in it for good measure, and ran it back down to inside the rear frame rail which is farther than halfway back to axle height. I used clear hose so I can see WTF is going on in the vent tube.

If it pukes gear oil now then it is because God wills it. 🤣

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Got a question.

I'm setting up all my vents ( F&R axles, trans and TC) the same way with these Joe's breather cans and a roll over valve at the bottom of them.

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They're all -6an to the bottom fitting.

I'm thinking of replacing the bottom fittings to -6an to -10an reducers and then run all -10 hose down to the respective end points.

Will this do what I hope it does by having the large hose keep the oil from making it's way all the way up to the vent cans? Giving the expanding air enough room to escape?

Rear vent can is at the top shock mount the other 3 will be at the top of the firewall.

Both axles have ARB's, so there's always the chance of "extra" air being pumped into the diffs.
 
Air is sooooo much thinner than oil that the only way oil gets up is when it's suspended in air. I don't think hose size is gonna matter much. If you've got fast moving air and suspended mist it won't matter whether you've got 3/8 or 5/8 hose.

Why not just run a manifold so a single can can handle multiple things (each with their own rollover valve, obviously)?
 
arse_sidewards said:
Air is sooooo much thinner than oil that the only way oil gets up is when it's suspended in air. I don't think hose size is gonna matter much. If you've got fast moving air and suspended mist it won't matter whether you've got 3/8 or 5/8 hose.

Why not just run a manifold so a single can can handle multiple things (each with their own rollover valve, obviously)?
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My thinking is that if oil from more than one of the sources makes it to a single breather can, they would mix and then flow back through the path of least resistance to maybe not even the source they started from.

The rear axle is all by itself so no worries there. The three in front at the firewall would be Severe Gear 250, Synthetic ATF, and whatever the Hero takes which I can't remember off the top of my head. A few drops wouldn't be a big deal, but repeated over and over could be a problem.
 
gt1guy said:
My thinking is that if oil from more than one of the sources makes it to a single breather can, they would mix and then flow back through the path of least resistance to maybe not even the source they started from.
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I figure a teaspoon or whatever in the wrong place won’t hurt anything :laughing:
 
Wisconsinite said:
I made this little guy. After running my vent plumbing, you will hate anything bigger than -6.

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I had that cool setup you made in the back of my mind the whole time I did my hack job. It helped me feel unworthy and stupid as I was slugging along.:flipoff2:

I did end up getting my individual breathers mounted. They're somewhat spread out so it doesn't look as bad as it could have.
 
I have a very similar problem with my TJ. It has a D44 rear axle (non-Rubicon), with JK44 gears, ARB and 35 spline shafts. Mine pukes oil out the end of the axle tubes of all places. Runs down the tire and leaves a puddle on the ground. It gets worse/pukes more when it is run hard or hot. I have burned up one ring gear when it ran dry on a long highway trip. I have good gears in it now, but I'm afraid to drive more than an hour from home, and I have to fill it up every couple weeks.

It is kind of a moot point now, as I am collecting parts for a one ton swap, but I sure would love to know what is wrong with it now. My friend who owns an axle and driveshaft shop is stumped. He says all the parts look good and he has never seen this before.
 
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