IGood morning JohnD 1956.
My buick is a 1956 buick roadmaster 4 door hart top no post.
I had this car for about a year car was sitting down for almost 15 years. Before i git my car running i have rebuilt following parts. Carburetor,fuel pump,water pump, generator, voltage regulator. Tun up , radiator and flush transmission oil as well with new pan gasket.
I have bean driving my car about a month with no issues. Las weekend i drove my for 40 minutes and notice theirs was a transmission fluid leak and. Transmission oil was leaking with pressure and transmission fluid coming out from deep stick as well. my car did not move on d or reverse at all. After and a hour i bought one quart of ATF transmission oil and poot one quart of transmission oil into to my car and shifted good no problems. I went under my car and noticed where is leaking from. Is on top from high acummelator where acummelator is connected to gears.