4 speed with fluid return hose

[cumminscruiser]

The FJ60 posted here and on eBay has a 4speed with a "fluid return hose", pardon my ignorance, but what is a "fluid return hose". Well obviously it's a "fluid return hose", you know what I mean...

[MoGas]

Methinks that it is one of those things to "fix" a bad seal between the tranny and transfer case.

[MoGas]

Yep, that's what I thought.

Do you have a problem where the transfercase oil level goes down and the transmission oil level goes up? This is caused by a failure of the seal between the transfercase and transmission, allowing the transfercase to pump its oil into the transmission. In extreme cases the transmission will overfill creating a mess when it starts to leak out of the shift tower and out of the input shaft seal soaking the clutch disc. The transfercase will then contain very little oil accelerating wear and possibly causing a great deal of internal damage. This kit allows the excess oil in the transmission to drain back into the transfercase. Kit includes fittings for both transmission and transfer fill ports and hose to connect them.

SOR

[cumminscruiser]

Would that help equilize the pressure in the two cases. They are vented I think.

[MoGas]

Originally Posted by cumminscruiser

Would that help equilize the pressure in the two cases. They are vented I think.

It would by nature equalize the pressures. However, I believe the design intent is to equalize the oil levels. The hose is attached at both fill tubes, so if the transmission is over full, the level will flow down the hose back to the transfer case. For some reason, during normal operation with a bad seal and no return hose, the fluid will go from the transfer case to the transmission and not the other way. Maybe there is a pump in the transfer case? I have never delved deeply into a Toyota transfer case, so I can't say for certain without consulting an FSM. I can look in to it this evening.

Dave

[MoGas]

Great info Here.

[rusty_tlc]

The T-case has a vent, the transmission vents through the shift lever opening.

There are no pumps in the t-case or transmission, just oil slingers.

The t-case gets hotter than the transmission and pushes oil into the tranny when the seal fails.

The $OR fix is a rip off, you can fab the same thing for about $10 in parts.
Just get a couple of fill plugs, drill and tap them for a 90° male hose barb, add a section of fuel line and a couple of hose clamps. Voila!


It is commonly stated that this is not a long term solution, however I have heard of people running this "Fix" for years. I did it on my FJ60 and plan to run it until I need to replace the clutch or upgrade the transmission to an H55 or H41.