Looking for tips for stopping a leaky transmission, 1972 Lemans Sport Auto


New member
Hello all, new to the forum. I recently purchased a 1972 Lemans sport, 400 engine, auto tranny. It has been in the family forever and known to leak transmission fluid. Per my father, if its is driven within a week leaking is minimal. Over a week and you start to get some major leaking. I have no idea how many miles are on the tranny by odometer is reading 22K so thinking 122K on the tranny.

My first thought was to try some lucas oil treatment or Sea Foam in the tranny. Before I mess anything up would appreciate others opinion.