The tranny in my '93 'trep was rebuilt almost 20k ago. The shop used Dexron fluid (aarrghhh!!). I ran it like that for a little bit, using an additive, but finally had it flushed, and the proper fluid added. Anyway, I have been getting the "bump stop" for a while now, and the other day when I first started off, I put it in Drive, and it hung for a second or two like it was in neutral, then slammed into gear. It has not done it since. Whaddaya think guys...sound like another tranny rebuild is in the future? I can't afford another one.