AFAIK, a band adjustment is only necessary if you are having symptoms, slipping, etc. If it is shifting fine, the bands are fine. If you're going to drop the pan and replace the filter (which never hurts), it'll be quite messy the first time, but not after that if you install a drain plug kit. I highly recommend doing this.
2003 WJ in Jeep Green Metallic, 4.0/242/4.10's. 4" Teraflex springs w/ RE monotube shocks and IRO short arms, cheap intake w/ amsoil filter, 2.5" hi flow cat and back exhaust, lots of lights and other misc crap.
Check out my build thread here:
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