I am new to this forum and to the wonders of the Dynaflow transmission. Yesterday (short story ), I purchased a 1962 LeSabre and drove home in low gear because it wouldn't shift from first to second no matter how much I tried to baby it along. This is not my first car with a wonky tranny, so I think this may be a problem with the vacuum modulator, (at least I am hoping so, because if it is, it's an easy fix) but I am having absolutely no luck at all trying to find one. I can get them for a '63, but I'm pretty sure there were modifications between the two model years.

Is this part available anywhere, or is there perhaps another fix? Or am I looking at a rebuild?

Thanks,
Maggie