I know this is something you don't really want to hear. A long long long long long time ago in a different galaxy. Oops mean my younger days, I ran into this problem too. I had a great tranny but when I went to a manual valve body, and didn't get it to low for a burn out I melt second gear out of it. Rebuilt the thing 4 times and always had that delay. Pulled everything out of that case and put it in to another case. First time out it shifted instantly, and has ever since. I never did really figure out what it was, but chalked it up to a cross leak some where in the case. If you have 1 avaliable you may want to try that. Thats a long shot but worked out for me. Don't care what kind of car it is, I hate to have a zipper on the tranny, LOL.