What is this hose?!

[MaxSteel2013]

Rolling around under the truck just now and I saw this hose hanging down from behind the engine. What is it? It doesn't look familiar and I can't tell where it is coming from exactly.

 

[ram1500rsm]

Trans, transfer case or front diff breather ?

 

[Mopar1987]

Is it the vent for the transmission or something?

 

[jmd4100]

Looks like a front tiff or trans breather

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[jmd4100]

Looks like a front tiff or trans breather

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*diff

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[ScLeCo]

Yup it's the transmission vent tube. I just zip tied it up under the cowl by the brake booster.

 

[MaxSteel2013]

Ah. That makes sense.

 

[Random_Walk]

Is it the vent for the transmission or something?

I doubt it's the tranny breather, since 2017 introduced the ZF sealed-forever-sucka 8-spd (and no dipstick, natch.)

...and if so, would that serve as an impromptu fill-tube?

 

[MaxSteel2013]

I doubt it's the tranny breather, since 2017 introduced the ZF sealed-forever-sucka 8-spd (and no dipstick, natch.)

...and if so, would that serve as an impromptu fill-tube?

Hmmmmm

 

[crash68]

I doubt it's the tranny breather, since 2017 introduced the ZF sealed-forever-sucka 8-spd (and no dipstick, natch.)

Even the ZF 8 speed still has a transmission breather. If you completely sealed the transmission it would blow out the seals when it heats up.
Ram has been using the 8 speed since 2013
That tube is most likely for the transmission, the transfer case is right on top it. The front differential tube is lower.