Hey,
I'm also considering a bit of towing (15'-20') Travel Trailer in the near future. I'm looking for something large enough to fit my needs, but under the 5,000 pound tow rating.
Stock 2002 X , 2WD:Towing Upgrades
1. 3 Core Radiator : The Original 1 Core looked very small in comparison.
2. Transmission Cooler : Must have upgrade for towing in my opinion.
3. Heavy Duty Shackles ordered (1 1/2 inch lift over Original) which hopfully will be installed this weekend (?).
I'm holding off on the " Upgraded Leaf pack " until I've determined its really needed ??
You might also consider some aftermarket " GAUGES " (See Parts & Access :Thread ; Autometer Gauges ).
I find it's very comforting knowing things are operating within normal (Temp/Press) using an indicated numbered scale ... !
L.M.