Odd tip behavior
 

Over the last few days I've noted two changes to my 98 box tip behavior. One it seems to more frequently go into "kick down" mode in D and when it does there's no indication it base gone down a gear. Secondly I noticed yesterday when in manual and coming to a stop in 5th it will shift down on it's owns I come to a stop. When I start back up it will not shift back up I have to do that manually. Are these behaviors normal? Fluid was changed about a month ago.

You might make sure the fluid is at the proper level, and check(clean) the selector switch along with it's harness connector. Best of luck with it.
regards

Do you have the means to scan it? Durametric can scan the tip....
If there are any faults they will be stored.
Look underneath for any fluid leaking on the tray below the gearbox. ...
The tip boxes need a very specific fluid (pentosin atf1 iirc or approved equivalent)
Who changed the fluid? There is also a fill procedure which must be followed

See my response in rennlist forum.