1999 Sliverado Transmission Fluid Leak

[edrhathaway]

Hi All...I have a 1999 Silverado that I recently noticed tranny fluid on the undercarriage (quite a bit).

After searching for a leak, what I found was a tube at the top of the transfercase that leads back to the tranny...and its from this tube I find where the fluid comes.

Any ideas on what this is? Is it a vent tube? And if so, is this telling me the filter is clogged or something else?

Thanks for any responses!
Ed

[pies]

that vent tube is so that the tranny can vent hot air as the tranny heats up. if you are getting fluid out of it , it means the tranny is either over full or the tranny is running too hot. service the tranny and make sure the level is correct.