Re: The Duchess Project: 1940 Super 8 Convertible Sedan

Posted by HH56 On 2019/7/18 12:38:24

The bolt with the hole is a breather and goes on the top cover.. I don't find the drawing at the moment but if I remember it was passenger side rear in that sort of raised location. On some there is a sheetmetal cap over the bolt to keep dirt out of the hole.

Since you can access the top of the trans you might verify the length of the bolt with one of the others to make sure they are all the same. Also make sure the hole at the right rear cover goes thru to the trans innards to provide a vent. If so then see if the bolt length placed in the rear location would raise the bottom of the bolt higher than in the present location. I could see that if the length of bolt threaded into the case far enough, it could place the bolt end near oil and expansion or being thrown by gears might let oil come out the hole.

Must confess, I don't see how a leak there could be getting inside the bellhousing unless there is some kind of opening I am missing. It would seem to me that a leak behind the bellhousing should be blown toward the rear of the car, not forward. If the bolt was not venting then I could see oil getting forced thru the nose and input shaft area due to expansion so this will be interesting once you figure it out. Could the oil be dripping down the side and into the bellhousing via the clutch fork opening or perhaps between the trans and bellhousing? Between would seem hard as I recall the shoulder on my trans nose was a snug fit into the hole in the bellhousing.