I'm getting ready to work on my diff and as I was looking at it I remembered that i've always had a problem with the fluids coming out of the vent. This is my second diff and i've always made certain to not overfill. Back when my car was running I would wash the diff every now and then with a high pressure hose to get the oil/crud off. Then after a couple of months it would be there again.

I noticed on my Chevy truck there is a two foot hose attached to the diff that goes up with the vent cap at the end of the hose.

Now I'm wondering do I just have a case of bad luck when it comes to my diff's leaking or is this a common problem?

And what do you guys think about putting a piece of hose to the top of the diff?

Hey Ed, gently pry the breather out of the rear cover and clean it out. In my generic differential manual it says that a clogged breather can actually cause oil leakage as the pressure builds up and forces oil out wherever it can past the breather. I know it sounds crazy but that's what the book says. I havent done this in awhile but I think the lower hole in the breather has to be positioned a certain way in the cover.

Much luck,

Chris

I got it out and blew through it. It seemed pretty clean to me. No obstructions of any kind. I don't know what it is. Does anyone else's leak?

Ed, I just threaded the back cover ind installed aeroquip fittings and hose to a catch can (puke can). All my breathers and overflow goes to the same catch can.

You could easily just slip a hose and a band clamp over the plastic pipe (take the cap off first) and run the hose to any location (with, or without a container). A low cost container could even just be a beer can (drink the beer first!).