I'm pretty new to all this - and totally new to the forum - but looking for some "help" - have a 00 4R with few mods (3" lift, sliders, etc) that spends most of it's time taking mu lovely lady to work - but we love to take it out and play - MO/ARK woods & CO mtns. BUT - has some tranny troubles - mech thinks it's a bad lip seal and needs to go in to fix it. big $$ - so thought of upgradiing while we're in there. Any ideas?