Transfer case oil level verification

[crash1964]

Guys, I’m leaking out of what appears to be the vent on the passenger side of the case up higher than the rear mounted fill/level check plug. Naturally I believe I’m overfilled by previous owner. FJ40 1978.
Am I correct in my assumption of locations and plugs? Shouldn’t I be just barely running out of the fill/check plug?
BTW this was a restoration so case was probably filled on the bench by some kid.
Thanks

 

[pb4ugo]

Yes the fluid should be level with the fill plug.

 

[bhsdriller]

Pull the fill plug and see what happens

 

[crash1964]

Pull the fill plug and see what happens

Yes it was over the fill plug top. Drained until it was running out at the base of the plug hole.

 

[crash1964]

Yes the fluid should be level with the fill plug.

Checked and drain to appropriate level. Was only over by approximately 7-8 oz.

 

[Pighead]

Checked and drain to appropriate level. Was only over by approximately 7-8 oz.

Check your transmission oil level, see if it's 7-8 oz. low...

 

[crash1964]

Check your transmission oil level, see if it's 7-8 oz. low...

Well it’s low but havent filled yet. Just went and bought oil. I sure hope trans isn’t bleeding over to transfer case!! I know they shouldn’t share levels. All I need is a crappy rebuild with no seal installed between the two. Lord help me!!

 

[crash1964]

Well it’s low but havent filled yet. Just went and bought oil. I sure hope trans isn’t bleeding over to transfer case!! I know they shouldn’t share levels. All I need is a crappy rebuild with no seal installed between the two. Lord help me!!

Good news is that bleed over is likely not occurring and transfer was just over filled. Bad news is, transmission was under by 22 oz so far and could not have bled over via bad or missing seal. I think it was under filled originally. I have a 5 speed manual instead of a 4 speed.
(Modification I knew about) I need a to just fill it a see from there!! Thanks

 

[charliemeyer007]

Do you have a manual? It covers all these questions.

Free downloads

Land Cruiser Factory Service Manuals (FSMs)

Factory service manuals (FSMs) for your Toyota Land Cruiser ! From the 1950s to the present!

www.cruisercult.com

If the seal goes between tranny/transfer, then oil tends to pump up from the transfer into the tranny, resulting in over filling the tranny. Shipmag sells a bypass hose assembly that connects fill plugs, so the oil returns to the transfer. When doing that you should run the brass synchro geal oil in both. GL4 is the stuff I think

 

[Living in the Past]

Good news is that bleed over is likely not occurring and transfer was just over filled. Bad news is, transmission was under by 22 oz so far and could not have bled over via bad or missing seal. I think it was under filled originally. I have a 5 speed manual instead of a 4 speed.
(Modification I knew about) I need a to just fill it a see from there!! Thanks

The bleed over into the transmission has to have something to do with pressure and how the seal is installed. If the seal was completely bad and splines worn on the tail shaft gravity will drain from the transmission to the transfer case. Fill levels transfer case is lower than the transmission. I would fill the transmission then keep checking to be sure it not getting into the transfer case. It is not easy to overfill either the transmission or the transfer case. Generally these are not filled prior to being installed definitely would not fill the transfer being mated to the transmission.

 

[crash1964]

Thanks I’ll keep checking

The bleed over into the transmission has to have something to do with pressure and how the seal is installed. If the seal was completely bad and splines worn on the tail shaft gravity will drain from the transmission to the transfer case. Fill levels transfer case is lower than the transmission. I would fill the transmission then keep checking to be sure it not getting into the transfer case. It is not easy to overfill either the transmission or the transfer case. Generally these are not filled prior to being installed definitely would not fill the transfer being mated to the transmission.

 

[crash1964]

Do you have a manual? It covers all these questions.

Free downloads

Land Cruiser Factory Service Manuals (FSMs)

Factory service manuals (FSMs) for your Toyota Land Cruiser ! From the 1950s to the present!

www.cruisercult.com

If the seal goes between tranny/transfer, then oil tends to pump up from the transfer into the tranny, resulting in over filling the tranny. Shipmag sells a bypass hose assembly that connects fill plugs, so the oil returns to the transfer. When doing that you should run the brass synchro geal oil in both. GL4 is the stuff I think

Tyranny was low but 53 oz. Here’s the kicker. I now know it’s not the original tranny. Used to be 4 speed now a 5 speed. That accounts for the low fluid level in tranny. Transfer case was only a little high. I corrected levels and fixed a couple of leaks. One leak I cannot stop is what I’ll call a ball check relief plug in the passenger side of the transfer case. I removed and took to Toyota dealer and they couldn’t find anything. Now my question is if the tranny is different let’s say a H55, perhaps the transfer case is as well??? Still Toyota dealer no help. I will try and upload a pic or two of the leaking valve.

 

[73FJ40]

"Used to be 4 speed now a 5 speed."

Was the shifter cane knob the giveaway?

 

[crash1964]

"Used to be 4 speed now a 5 speed."

Was the shifter cane knob the giveaway?

yup

 

[crash1964]

yup

I’m just hoping someone might know where I can get a new valve. I uploaded pics thanks