rarjar, most of those antennas work MUCH better when they have metal underneath them. Don't ask me why. Make sure you have a metal plate (ferrous) under it. Might help boost your signal and stop your signal loss if you don't have the plate. If you have the metal plate under it, then you might have to go for the roof as it might be you cab roof is blocking the signal when you head in certain directions, most likely North.

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2007 SR5 Crewmax 5.7L 4x4
Mods: nerf bars, Truxedo tonneau, radar detector power, 3M clear bra, fog lights, black billet grille, rear differential breather, parking sensors, Line-X, power tailgate lock, hood safety latch mod, one off driving lights behind grille, Pioneer NAV w/ OEM camera, Flowmaster 50 SUV dual/dual, blue LED dash lights, Volant CAI, Llumar tint, CompuStar Pro alarm, ProComp 6066 20" wheels, Cooper Zeon LTZ 275/60/20 tires, OME HD coilover lift, Firestone helper air bags, stereo cable lock, Tekonsha P3 brake controller
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