Some cable / hose to my T-Case? NP205. Tranny fluid?
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Some cable / hose to my T-Case? NP205. Tranny fluid?
Probably a dumb question.. there is some hose or cable that goes to the rear of my t-case (into the housing that goes into the rear driveshaft), it's starting to melt because it's laying on my exhaust.. and I think it's leaking transmission fluid? what is it? my manual doesn't tell me.
I'm not even sure this is what's leaking.. it always seems wet. but the first U-Joint right after my T-Case always seems to be wet with transmission fluid, plus underneath my bed is thick with the stuff, like it sprays as I drive.
this truck does a lot of sitting with very little driving, so I'm not sure about the latter part.. I just can't figure out what in the hell is going on and why transmission fluid would be anywhere near these parts. Why would it leak through my transfer case?
I'm not even sure this is what's leaking.. it always seems wet. but the first U-Joint right after my T-Case always seems to be wet with transmission fluid, plus underneath my bed is thick with the stuff, like it sprays as I drive.
this truck does a lot of sitting with very little driving, so I'm not sure about the latter part.. I just can't figure out what in the hell is going on and why transmission fluid would be anywhere near these parts. Why would it leak through my transfer case?
Last edited by ErrorS; Sep 16, 2007 at 08:57 PM.
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you should have a vent and a speedo cable back there. Neither of which should have transmission fluid in it.
http://www.offroaders.com/tech/Diagrams/np205.htm
See if this helps you a little. Are you even sure it is a 205, and not a 203? Some guys ran trans fluid in the 203, but the 205 generaly has gear oil. Sometimes it can come out of the speedo cable, and if something is wrong, it can come out of the vent too.
Need to determine which of the two it is.
http://www.offroaders.com/tech/Diagrams/np205.htm
See if this helps you a little. Are you even sure it is a 205, and not a 203? Some guys ran trans fluid in the 203, but the 205 generaly has gear oil. Sometimes it can come out of the speedo cable, and if something is wrong, it can come out of the vent too.
Need to determine which of the two it is.
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part time is the 205, right?
I wonder if it's possible one of the many crappy mechanics I've had work on this truck put tranny fluid in my t-case?
It's probably the speedometer cable, it doesn't look like a vent.. it's coming out of the passenger side of the T-Case, some housing that goes on top of it. It's possible fluid is spraying onto the cable.. that first U-Joint seems to always be wet with transmission fluid and when it spins I think it sprays the whole underside of the truck (including the cable i'm talking about).. but I was hoping this was some hose that was leaking onto the U-Joint.. a hose is easier than some internal seal in my t-case :\
I'll drain the T-Case tonight and see what's in it..
I wonder if it's possible one of the many crappy mechanics I've had work on this truck put tranny fluid in my t-case?
It's probably the speedometer cable, it doesn't look like a vent.. it's coming out of the passenger side of the T-Case, some housing that goes on top of it. It's possible fluid is spraying onto the cable.. that first U-Joint seems to always be wet with transmission fluid and when it spins I think it sprays the whole underside of the truck (including the cable i'm talking about).. but I was hoping this was some hose that was leaking onto the U-Joint.. a hose is easier than some internal seal in my t-case :\
I'll drain the T-Case tonight and see what's in it..
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There is also a seal on the output shaft / yoke for the case. These leak all of the time. Easy to change too. Make sure you inspect the actual yoke for grooves that the seal can make over many amny miles of use.
National seal and others like CR also make a double seal that really eliminates leaks and overcomes this little groove problem that a single style seal can create. If the seal is bad, then it may just be allowing the fluid to pass the seal and spin off of the yoke. Would explain why everything is wet, but does not explain why the t-case ahs trans fluid.
Yes the 205 is a part time case, but so is a 203 with a conversion. Either way it does not matter, but you do not want to run gear oil in a 203. the 203 needs a lighter oil for proper lubrication. They are easy to identify.
independant shift rails (round) on the front of the case indicates a 205. These slide in and out of the case.
Two levers on a common shaft on the side of the case would indicate a 203.
The easiest way to determine would be the tag on the case. can't miss the stamped letters and numbers.
National seal and others like CR also make a double seal that really eliminates leaks and overcomes this little groove problem that a single style seal can create. If the seal is bad, then it may just be allowing the fluid to pass the seal and spin off of the yoke. Would explain why everything is wet, but does not explain why the t-case ahs trans fluid.
Yes the 205 is a part time case, but so is a 203 with a conversion. Either way it does not matter, but you do not want to run gear oil in a 203. the 203 needs a lighter oil for proper lubrication. They are easy to identify.
independant shift rails (round) on the front of the case indicates a 205. These slide in and out of the case.
Two levers on a common shaft on the side of the case would indicate a 203.
The easiest way to determine would be the tag on the case. can't miss the stamped letters and numbers.
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I can't believe it, I spent a total of 8 hours on this truck today and didn't look at the T-Case once..
I'm pretty sure it's an NP205. The shifter goes into the front of the case if I remember correctly, I'll check it tomorrow.
i bet it's that seal though, it sounds right.. and I'm guessing some moron mechanic put ATF in my T-Case one of the dozen times I've taken this in to be fixed (each time killed the truck a little bit more). it's definitely transmission fluid. I hope the only thing the ATF broke was that seal, I have noticed my T-Case seems harder to shift lately.. might also explain that ticking sound I get from inside the cab.
Thank God I've learned how to fix this truck myself, the local mechanics would have destroyed it if I hadn't.
so it's as simple as taking that cover off and replacing a seal? I don't have to drop the t-Case (something I dread, it looks heavy). I'm going to replace all U-Joints next week, might as well do it then.
I'm pretty sure it's an NP205. The shifter goes into the front of the case if I remember correctly, I'll check it tomorrow.
i bet it's that seal though, it sounds right.. and I'm guessing some moron mechanic put ATF in my T-Case one of the dozen times I've taken this in to be fixed (each time killed the truck a little bit more). it's definitely transmission fluid. I hope the only thing the ATF broke was that seal, I have noticed my T-Case seems harder to shift lately.. might also explain that ticking sound I get from inside the cab.
Thank God I've learned how to fix this truck myself, the local mechanics would have destroyed it if I hadn't.
so it's as simple as taking that cover off and replacing a seal? I don't have to drop the t-Case (something I dread, it looks heavy). I'm going to replace all U-Joints next week, might as well do it then.
Last edited by ErrorS; Sep 18, 2007 at 01:06 AM.
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Wow, the fluid looked like it had transmission fluid, oil and water in it. The oil was milky brown (water, right?) but more the shade of butterscotch than chocolate milk. There were streaks of red in it, it looked like transmission fluid that was seperated (like it didn't mix) with the water and oil.
will draining my T-Case be enough? or should I flush it somehow? this stuff was nasty. I don't know how sensitive they are to non-perfect oil.. about like axle gears? or more like transmissions?
will draining my T-Case be enough? or should I flush it somehow? this stuff was nasty. I don't know how sensitive they are to non-perfect oil.. about like axle gears? or more like transmissions?
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You should still be alright, and oil is cheap enough to fill it, drive it around to get the temp up, and drain it again. This should clear out all of the junk from in there.
It is also a good idea to completely remove the seal by removng the adapter. This is a small aluminum housing that retains the seal itself. You do not want to go in like a "bull in a china shop" with a screwdriver trying to pry out the seal. This might damage the seal surface and the thing will leak from the edge where the metal part of the seal meets the retainer. Instead remove the whole retainer, and use a large socket to apply even pressure when you tap it out from the back side. It will come out easily this way. Then, it is easier to install the new one, and you will not damage the aluminum retainer.
Also make sure once you remove the retainer that you re-install it correctly. It does have a direction. There is an oil passage that you will plainly see. It has to line up with the hole, or oil passage in the case. You will see when you get it out.
Take your time, and it will come out clean.
It is also a good idea to completely remove the seal by removng the adapter. This is a small aluminum housing that retains the seal itself. You do not want to go in like a "bull in a china shop" with a screwdriver trying to pry out the seal. This might damage the seal surface and the thing will leak from the edge where the metal part of the seal meets the retainer. Instead remove the whole retainer, and use a large socket to apply even pressure when you tap it out from the back side. It will come out easily this way. Then, it is easier to install the new one, and you will not damage the aluminum retainer.
Also make sure once you remove the retainer that you re-install it correctly. It does have a direction. There is an oil passage that you will plainly see. It has to line up with the hole, or oil passage in the case. You will see when you get it out.
Take your time, and it will come out clean.
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thanks, I would have just hammered the SOB out with whatever I could find to do it with.
Bad habits.. I broke off a screwdriver between my waterpump and block today, before realizing I missed a bolt.
Bad habits.. I broke off a screwdriver between my waterpump and block today, before realizing I missed a bolt.
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