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Daves55Sedan · 11-18-2021, 06:38 PM

It is removable without disturbing the engine on a full-size car, but I don't know about T-Birds.
Most likely leak points would be: 1) converter-to-impeller housing large o-ring seal cracked, 2) front pump seal worn out, 3) trans pan gasket shot, 4) fluid filler tube-to-pan nut not tight enough.
The last two are the only ones that don't require transmission removal.
I would suspect that if the pan gasket was shot, it might only leak when driving. Same holds true if the park plug in the back of the trans case was blown out.

11-18-2021, 06:38 PM	#3
Daves55Sedan Senior Member Join Date: May 2010 Location: Granite City, Illinois Posts: 3,008	Re: My 56 Thunderbird transmission Leaks? It is removable without disturbing the engine on a full-size car, but I don't know about T-Birds. Most likely leak points would be: 1) converter-to-impeller housing large o-ring seal cracked, 2) front pump seal worn out, 3) trans pan gasket shot, 4) fluid filler tube-to-pan nut not tight enough. The last two are the only ones that don't require transmission removal. I would suspect that if the pan gasket was shot, it might only leak when driving. Same holds true if the park plug in the back of the trans case was blown out.