I have a 2006 I think an X. It has the 4.0 Engine, 42rle Trans and 3.73 axles. I just noticed the last two times I drove the Jeep the first transmission shift was very noticeable. Before the trans shifting has always been very smooth. It only did this the last two times I drove it, and only at first in the morning. That first shift was I guess you would call it a hard shift. After that it went back to being as smooth as usual. I recently went to moab wheels with 31"tires, but I had 30" tires before that for a long time. I can't afford a gear swap right now, and I only drive around town with the top off, no offroading at all, just like Jeeps in the summer. The only change I made is to cancel the over drive first thing before I take off. The fluid is very clear and pink, no burn smell. Does the first shift doing this mean something, or should I perhaps do a fluid change. Any opinions will help. I have nevr understood auto transmissions and this is the first I've had in a Jeep.