When I pull my RV with my 2001 X, my temperature will start creeping up towards the top line. I was thinking about adding a second elec fan on the right side of the radiator next to the elec condenser fan and adding a trans cooler. Any suggestions? I recently bought this from a friend who within the last year replaced the water pump, hoses, and radiator. I discovered that the fan clutch was bad and replaced it but it still gets warm.

Tranny cooler would help lots. Extra fan couldn't hurt, but check for even the slightest leak. A leak relieves pressure and allows air in. This in turn allows the water to heat up.

Jeff!

Most likely time for a new radaitor.

Get the engine up to temp, shut it off and use your hand to feel the back side (engine side) of the radaitor, the radaitor should be moderatly warm to the touch, if you feel any cold spots that indicates a blockage and the radaiator would need replacing.