Calling all forum members, I need some help verifying the identity of this component; - Jeep Commander Forums: Jeep Commander Forum
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post #1 of 14 (permalink) Old 05-31-2019, 10:42 AM Thread Starter
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Question Calling all forum members, I need some help verifying the identity of this component;

So, I had an oil change done at a new dealership in St. Augustine and they took what I thought was a long time to do it; The service advisor said it was because they were doing the multi-point inspection and my belly super-lift skid plate had a few different size bolts on it. I thought that was kind of odd; On the drive home I noticed an odd sound if I accelerated hard, almost like a spring binding rubbing kind of sound but only at very hard acceleration. No fluid leaks, no smoke, no DTC's in the EVIC;

So today, I decided to pull the belly skid plate off and take a look to see what I can see and right away, the first thing I noticed is that the hose going to this component on the driver's side of the front axle circled in red, was off and just hanging there; I'm guessing that the component in question is the front differential? Can anybody confirm that for me?

Also, I'm wondering what fluid flows through the hose in question, as I don't really see any indication that anything has been - or is dripping out of it. Fortunately, the hose was long enough that I could work enough slack through the clip holding it to the chassis where I could comfortably reconnect it without putting too much stress on it, I want to add a hose clamp to it so it doesn't come off again. Thanks in advance for the help.





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Last edited by Big Blue; 05-31-2019 at 11:39 AM.
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post #2 of 14 (permalink) Old 05-31-2019, 11:06 AM Thread Starter
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O.k. so, the other end of that hose isn't connected to anything;



And it looks like it's supposed to sit right here; I have no idea what purpose it's supposed to serve, just seems like an extra hose that's sitting there.



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Last edited by Big Blue; 05-31-2019 at 11:39 AM.
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post #3 of 14 (permalink) Old 05-31-2019, 11:15 AM
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I think thats the breather tube for the diff
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post #4 of 14 (permalink) Old 05-31-2019, 11:37 AM Thread Starter
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Quote:
Originally Posted by fastmunny View Post
I think thats the breather tube for the diff
Thanks for the reply. Do you know what it does??


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post #5 of 14 (permalink) Old 05-31-2019, 11:53 AM
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As pressure increases in the diff, it vents to prevent seals from blowing.
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post #6 of 14 (permalink) Old 05-31-2019, 12:39 PM Thread Starter
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Quote:
Originally Posted by fastmunny View Post
As pressure increases in the diff, it vents to prevent seals from blowing.
Do you think it was detrimental that the hose was off?

Seems like pressure could have just blown out of the fitting that the hose connects to, if need be....


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post #7 of 14 (permalink) Old 05-31-2019, 12:49 PM
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Quote:
Originally Posted by fastmunny View Post
I think thats the breather tube for the diff
Spot on. Breather tube for the front diff. Most vehicles just have a little vent right on the diff. Jeep (and other 4x4 makers) add a tube and place the vent much higher. Why?? If your diffs are warmed up from use, and you go driving into some deeper water the diffs cool pulling in air. If the vent is under that water it will suck the water in instead. BTW, I had a dealer do my superlift, and they also put several different types bolts in for the SL skid plate.

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post #8 of 14 (permalink) Old 05-31-2019, 02:10 PM Thread Starter
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Quote:
Originally Posted by Up4XK View Post
Spot on. Breather tube for the front diff. Most vehicles just have a little vent right on the diff. Jeep (and other 4x4 makers) add a tube and place the vent much higher. Why?? If your diffs are warmed up from use, and you go driving into some deeper water the diffs cool pulling in air. If the vent is under that water it will suck the water in instead. BTW, I had a dealer do my superlift, and they also put several different types bolts in for the SL skid plate.
Glad it wasn't just me; Kind of a pain getting it off when you're lying on the ground - even more so putting it back on.


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post #9 of 14 (permalink) Old 05-31-2019, 02:29 PM
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Quote:
Originally Posted by Big Blue View Post
Do you think it was detrimental that the hose was off?

Seems like pressure could have just blown out of the fitting that the hose connects to, if need be....
The only way it would be detrimental is if you drove through water deep enough for water to get in the differential while the tube was off.

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post #10 of 14 (permalink) Old 05-31-2019, 06:42 PM Thread Starter
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Quote:
Originally Posted by jeep5253 View Post
The only way it would be detrimental is if you drove through water deep enough for water to get in the differential while the tube was off.
Gotcha; I didn't do that, so, I guess I'm o.k.

The tube is back on now and zip-tied in place.


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