That "fitting" should have a rubber hose on it, running up into the frame, or up high on the car, with a one-way valve that lets it vent to the atmosphere, but closes to prevent water etc. from entering. The one-way valve goes in the other end of the hose, i.e., the one not connected to the axle. If you had a hose, you probalby would not be losing fluid, unless of course it's overheating and something's wrong. WITHOUT a hose, it's probably simply operating normally and slinging oil off the spinning axle out the hole/orifice. If you have another car with an axle, you can check out the location and approximate that with a piece of fuel line and I bet you'll be fine. --Brooks in Dallas >From: YBSHORE@xxxxxxx >Date: Wed Jun 14 16:30:04 CDT 2006 >To: mailing-list-owner@xxxxxxxxxxxxxxxx >Cc: mailing-list@xxxxxxxxxxxxxxxx >Subject: IML: (no subject) >Fellow Imperialists, I own a 1956 four door sedan and am still working bugs out of a long dormant beauty and I am having trouble with a fitting on top of the rear axle which looks like it provides relief for the rear diff as well as a tee fitting for the hydraulic brake system. Though at this time I do not have performance issues, I am leaking constantly out of it and am concerned I will run out of either diff or brake fluid on the road in a catastrophic incident. I have cleaned and refit it several times to no avail. Is there a trick I am missing? ybshore ----------------- http://www.imperialclub.com ----------------- This message was sent to you by the Imperial Mailing List. Please reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be shared with everyone. Private messages (and attachments) for the Administrators should be sent to webmaster@xxxxxxxxxxxxxxxx To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm