Well, just an update for you all. This weekend we changed the tranny filter in my girlfriends 04 KJ. I think the problem is fixed, it doesn't slip nearly as much as before, it feels prety solid now!!! Fluid didn't seem bad...but whatever, it worked!
The first time when we couldn't change the filter, and just did the fluid, it didn't seem to make much difference. This time it made a difference!!
So just incase anyone is planning on doing a tranny fluid change on their KJ, here is some info for ya:
Get the largest drain pan that you can get. No drain plug

And since the exhaust pipe hits the edge of the pan while coming down, it's really hard to get the oil to drain from just the corner. I made a mess!! Luckily I had a bunch of kitty litter!
You MUST use ATF+4, which you can't get everywhere. Specially designed for these new chrysler trannies, if you use anything else, you'll kill the tranny!!
Don't even bother trying to get the filter at an auto parts store. Go straight to the dealer with your VIN # in hand. If you do otherwise I guarantee that you'll get the wrong filter, more than once!
After dropping the pan and changing the filter, it took just under 5 qts of ATF+4 to get it to the proper level. This may vary a bit from year to year, this was an 04 KJ.......jsut be prepared with atleast 5qts when you do this. My XJs AW4 auto takes almost exactly 4qts for a filter change....so I'm glad we got that extra bottle!
That is all.