Folks,


I've got a pretty significant (ignored and never fixed, so there's a ton of nastiness under my truck) leak right above my transfer-case. At first I thought the rear output seal was leaking ( it was) so I replaced that, but I'm still having oil (I'm pretty sure it's oil) leaking out and making its way onto my cat converter(terrible burning smell). I got underneath my truck again and snapped a picture of what I believe to be the source of the leak.

Here's the picture of said culprit:


I think its the thing right underneath the bolt in the picture.


Can anyone tell me what this is exactly, and what I need to do to fix it? I've searched all over the place and found nothing.



And here's this just cause the weather was nice



Thanksfolks!

 

You can`t smell that you have fuel leaking??

As those two lines are your fuel lines.

Did you spray something else on the undercoating that caused it to break down??

 

I sprayed some degreaser to try and find where the leak was originating. I did notice a smell of rich exhaust, but nothing I found alarming....


What is the process of fixing this? Can I replace the junction that they are leaking at, or would it all need to be replaced? My knowledge in fuel systems is pretty much zero, but I've got time to learn since this isn't my DD.


Thanks

 

How you do it is up to you.

As long as the leak is stopped.

It must be the return line leaking or fuel would be spraying all over.

Replace with metal

Splice in a section of Fuel injection hose

 

Is the fluid level going down in the transfer case? It should be quite obvious if it's gear or or gas by the smell.

 

I had a transfer case leak that I thought was the front drive shaft seal, because that's where the oil was accumulating. Replaced the seal with no improvement. Finally realized it was leaking at the top plate where the shift lever bolts on to the case. My mechanic had that off when he pulled the transmission and xfer case to replace the rear crank seal, and apparently didn't get the gasket installed properly. I RTV'd the top plate and all is good now.

I just mention that since you say the leak is "above your transfer case."

 

The first thing just find out what is leaking!!

 

Absolutely. There's nothing in that picture that gives any conclusive evidence as to where the leak is coming from. It's almost surely oil, not fuel, since fuel evaporates right away and doesn't leave any significant residue (unless you have a diesel). Leaking fluids usually flow down, due to gravity, and towards the back of the vehicle, due to air flow while moving. So, the highest and most forward place where there's oil is usually pretty close to the actual leak. Of course, once it gets on a rotating drive shaft it gets slung all over, so that makes it even harder to tell.

 

Yes, find the leak. To do that, you need to get the greasy area as clean as you can. The Auto supply store will have a selection of degreasers that you spray on, then rinse off with plain water. It's a thankless job working underneath (you're going to get wet), but it will work.

Once it's as clean as a whistle, fire it up and the leak will be easy to find. And as the others say, there's a good chance you will find it many inches UP.

 

That point is the very furthest forward on the vehicle where the leak begins. I'm not 100 but I was pretty sure when I wiped away the fluid, I noticed more of the oil looking substance continue to leak from those lines(def. not fuel).


I guess I'll be getting filthy again as soon as I get the chance :YAY:

 

Is anything really leaking??

Anymore??

Or is it the mess from the Transfercase rear seal

The top of the case.

What does it smell like ??

It only looks wet where you cleaned off .