I did a search and couldn't find a good match. My 02 4.0 WJ has been down shifting very hard when the cruise control is on. This is an intermittent problem. The easyest way to describe the problem is as if you manually drooped the transmission down into 2nd gear at 50 mph. Anybody have any ideas where to start looking?
Sounds like what the link you posted describes, if I remember right from my 4.0L days it wasn't exactly a pleasant experience. but there could be other problems inside the transmission. How long ago was the fluid changed? It may just need some fresh fluid and filters and a band adjustment. I can't find the article on band adjustment right now, I will post back later if I find it.