View Full Version : Transmission leak at the filler pipe.

Robert Wadman
06-16-2015, 05:14 PM
I'm restoring a 1959 Thunderbird 430 Convertible. I have a transmission leak at the connection where the filler pipe connects to the transmission pan. Is there an "O" ring that fits this connection point? Is the treaded nut, that surround the filler pipe at the transmission pan, all that is needed to secure the filler pipe the transmission pan?

06-16-2015, 05:21 PM
Tighten the nut and see if it is loose. I think you have a simple compression fitting but I might be wrong. You will know after you tighten the nut.

06-16-2015, 06:04 PM
Dave is right, it is a simple compression fitting. Be careful not to overtighten it, as it will crack the weld of the fitting to the pan. I've done this but I had an extra pan. On the new pan, I was able to select an "O" ring that I inserted into the fitting to prevent overtightening and any leaks. It's working fine at present but I haven't put any miles on the car.

06-16-2015, 09:18 PM
It's been a while since I fixed mine, but if I recall, the end of the trans tube has a flared fitting, very much like a gas line.
What I found with mine was that the tube actually cracked. I removed the tube, cleaned it, and soldered the cracked area. When reinstalling, be sure there is not any strain on the tube and the support bracket to the rear of the engine is in place.