my transfer has red oil im assuming its trans fluid lol.... is this gonna hurt it do i need to drain and swap for gear oil??? if there is a seal leaking is it an easy fix with common sence im thinking theres a shaft that goes from the trans all the way throught the case making this fix a pain in the ass....
any help please???
thank you for all the usefull info you guys have givin me

as far as i know, the 205 likes anything slippery, you could probably giz in a hundred times and the 205 would be alright

as far as i know, the 205 likes anything slippery, you could probably giz in a hundred times and the 205 would be alright

lmao good to know thank you

seriously.

I was always told put whatever fluid you run in the transmission put in your 205. If the imput seal goes bad on the 205 you get cross contamination.


As stated the 205 will run on anything oily.

Wheel

Thats weird because I have seen manuals call for gear oil,motor oil and ATF.
Wouldn't the ATF cause a bad seal to leak worse?

both gear oil and tranny fluid were put in from the factory. This is a big can of worms you've opened. Let the big debate on which one it "should have" begin...................................again.

Let the big debate on which one it "should have" begin

Muh...is there any reason to run anything but gear lube in that it offers the best protection against extreme pressures, regardless of what was in it originally?

In either case you might want to check those seals. It's not that having tranny fluid in it is going to hurt the transfer case so much as not having the tranny fluid in the tranny is going to hurt it. Removing a 205 from any vehicle is a bit more labor intensive than later model aluminum chain drive units, but if you provided a little more information about the year and model of the transmission in front of the case you could probably get a better answer as to what is involved.

you could probably giz in a hundred times and the 205 would be alright


That is usually a trail only type of fix :flipoff2:

That is usually a trail only type of fix :flipoff2:

Yeah when you're wheeling with the village people... :flipoff2:

my transfer has red oil im assuming its trans fluid lol.... Back to the subject of using anything slippery, how do you know its not blood???? is this gonna hurt it do i need to drain and swap for gear oil??? if there is a seal leaking is it an easy fix Is this a question, a theoretical question or a statement?with common sence does that even exist anymore? im thinking theres a shaft that goes from the trans all the way throught the case making this fix a pain in the ass....
any help please???
thank you for all the usefull info you guys have givin me


As for the BS above....a little puncuation helps direct the main body of the thread...

As mentioned, they came with both ATF and dino oil.

Leaking seals are easy enough to fix. Its the tear down, disassembly and reassembly that makes it a PITA.

There is a shaft. Two actually. Output from transmission. Which is sealed. A coupler that connects that one to the input shaft in the t case. Also sealed.

As has been discussed in previous posts, NP205 transfer cases require 80-90wt Gear oil.

Sure, you could run something else. some people do. 80-90 provides the correct lubrication to helical cut gears in this particular application.

with that said... run what you want... I know my np205 hasnt died yet due to having the right fluid in it... you can test the theory of using the improper fluid and tell me what your outcome is.

I would run either 80-90 or motor oil depending on the climate. Different manufacturers have spec'd out different lubricants for 205's throughout the years.

I personally run 80-90 in my wheeling rig and 10-30 in my tow rig for less drag.

In either case you might want to check those seals. It's not that having tranny fluid in it is going to hurt the transfer case so much as not having the tranny fluid in the tranny is going to hurt it. Removing a 205 from any vehicle is a bit more labor intensive than later model aluminum chain drive units, but if you provided a little more information about the year and model of the transmission in front of the case you could probably get a better answer as to what is involved.

trans is a th350 truck is a 69 chev that came with a 4spd and is very tight

as long as the trans will keep the oil it needs im willing to test the theory... but its not so im goin after the seal

Only common sense would tell you to fix the leaky seal if that is you problem cuz sooner or later you are going to have to replace the transmission due to the fact that if you are to lazy to fix the seal you probably are not going to check the level in the trans or the transfer case for that matter. Also if it gets to the transfer case you have more than one bad seal. Put the right fluid in it its called gear lube.

You've got a bad seal between the tranny and the t/case, period. You can use whatever fluid you want, but GM used gear oil when new, not atf fluid. ATF fluid contains alot of detergants that doesnt really offer the same cusion as gear oil. There are no cluthces in the np205, so use gear oil and it'll live a long time.