What does this hose do? (1 Viewer)

[1982FJoe40]

Can someone tell me what is the purpose of this hose? It's going from the tranny to the transfer case.
The manual I have shows I'm supposed to check the oil right around where it comes into the transfer case.

 

[maty]

Oil equalizer,sothe oil can go back into the gearbox from transfer,also where you fill them from
Sent from my phone somehow

 

[GA Architect]

This should help explain it: https://forum.ih8mud.com/threads/transmission-to-transfer-case-bypass-hose.794901/

Actually, here is more than enough reading on the subject: https://forum.ih8mud.com/threads/tranny-to-transfer-case-bypass-hose.95870/

 

[Fast Eddy]

It does Good Things™, that prevent Bad Things™.

 

[GA Architect]

It does Good Things™, that prevent Bad Things™.

....and that's why I bought one. Here soon, when I drain and replace the transmission & transfer case gear oil with some Red Line MT-90, I'm going to install Lou Hagler's hose.

This Stainless Steel braided hose will compliment the Stainless Steel bolts I'm using when needed....Some "BLING" for under my rig!

 

[1982FJoe40]

Thanks Guys, I should replace my hose. Looks very cracked.
So, is this where you also check the oil? Seems like an odd place to check the oil, but I noticed on older FJ's that didn't have this hose, that seems to be where you check from.

 

[Weber Sarge]

That hose replaces the stock oil level plugs , just fyi ..
Sarge

 

[slangdog]

My understanding is that if the seal between transfer and gearbox goes the pressure pulls the oil from one into the other. This hose is added to equalize that pressure and keep everything working how it should. So yeah you'd check oil levels in the same spot because it's not really meant to be there

 

[GA Architect]

A photo of my "Transmission to Transfer Case Bypass Hose".

 

[watrob]

Lets oil from your transfer case back into the transmission, the reason is transmission oil gets passed the seal and leaks in the transfer case, this hose feeds it back to the transmission. Its a fix that has been around for more years than I can remember.

 

[brian]

it's not oem. it is a band aid for a failed seal.

 

[watrob]

it's not oem. it is a band aid for a failed seal.

Its strange that you get this hose also when you buy a fully reconditioned 5 speed, knowing that the seal will leak so you get the fix in advance.

 

[Landpimp]

pic of an early version which came on my 45LPB

 

[brian]

so is there a "cam lobe" on the prop shaft to activate that??