Well this is interesting - mine measures 24 inches too, but if I fill to the mark running and warmed up it's over full. The transmission shop that built it for me told me when warm and full it should be at about the gasket line in the pan. I ended up using a clear hose to establish the fill level by running it down the dipstick tube, and bottoming it on the pan then measuring level by coming back up the stick by the level of the pan. When I did this, after sucking fluid out to get it to the right level, it stopped puking fluid out the vent. The full level is about where the first D in the word Add is on the stick that Marty has. The tube is the original for the car. Hmmmm, not sure what to think about this now.