Anyone got any ideas why the vent on the front diff would be puking oil????? I'm wondering if a valve or something has crapped out in the tranny and is boosting the front. This all started back during the freeze a couple of weeks ago. Had it in auto-4 just in case and when I got home that evening the output seals were blown and leaking. I assumed that at 70K it was just worn seals. Got them replaced and didn't discover anything weird in the process. Then the next day when I get to work I notice fluid in the fender well and think that maybe I pinched a brake line. Pulled the wheel that evening and brake lines were fine but notice that it looks like the oil is seeping from the engine compartment. Pop the hood and sure enough the vent is wet with fluid. So.....what happened?

I'm thinking that I have an internal problem but don't have a clue where to start looking other than up front.

 

replace the vent we have quite a few problems with them

 

Anymore info on this? The whole line? The fitting in the case? Just the cap?

 

its the fitting that screws into the front diff on the drivers side

 

Not to be a PITA.....but would you happen to have a part#? I looked at GMPD and couldn't come up with anything. Also, what seems to be the issue with them? Is there some kind of check in them that craps out? TIA!