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Old Apr 27, 2017 | 02:42 PM
  #1  
BigLickF350's Avatar
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Identify this part

So I switched the junk "Rancho" front shocks out this morning to some Rancho 9000xls. As part of the process, a sensor or some component is attached by way of a cap to the front left shock post and must be popped off. Unattaching it was the hardest part of the install. Pictures are attached. The part just hangs out up in the engine bay (or at least mine does?).


Part. No. on the tag is HC34-3B476-AA. Any ideas what this is? I'm wondering if it has something to do with the off road angle sensors? I do have the FX4 model.
 
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Old Apr 27, 2017 | 02:54 PM
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Is that possibly a vent off the front differential? Looking at the Ford Manual look to be the breather hose.
 
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Old Apr 27, 2017 | 02:55 PM
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Originally Posted by wb6anp
Is that possibly a vent off the front differential?
That's exactly what it is.
 
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Old Apr 27, 2017 | 03:18 PM
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I will crawl under tonight to try and trace the line back to the other end. Most diff vent tubes I have seen in the past have a little breather type element at the end of the tube to permit venting and not a solid plug like this tube has.
 
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Old Apr 27, 2017 | 03:21 PM
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Diff vent for sure!
Trace it back to the diff for confirmation.
 
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Old Apr 27, 2017 | 03:25 PM
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Id check mine, but it is at the dealer getting the t-case replaced.
 
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Old Apr 27, 2017 | 03:51 PM
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Originally Posted by wb6anp
Id check mine, but it is at the dealer getting the t-case replaced.
not to hijack, but glad you were able to finally talk them into that rather than just dealing with the leaks/spray...
 
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Old Apr 27, 2017 | 05:01 PM
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I think a bearing finally failed, that was causing the output shaft to wobble, destroying the seal. The last time I took it on the oil in the bottom of the truck was laden in metal. I thought it was e engine oil from a leaking oil filter but there is no way to get oil back there without getting it on everything else. And everything else was dry.
 
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Old Sep 5, 2020 | 07:37 PM
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Crawling around under my new to me 2019 F250 today, I also this HC34-3B476-AA tube hanging.

should this be connected somewhere? Should I take it to the dealer? Should I stop driving the truck?
 
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Old Sep 6, 2020 | 07:57 AM
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Originally Posted by losttrail
Crawling around under my new to me 2019 F250 today, I also this HC34-3B476-AA tube hanging.

should this be connected somewhere? Should I take it to the dealer? Should I stop driving the truck?
Differential vent tube. You're good to go. Good luck with the truck!
 
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