I've put polyurethane track rod bushings on high mile rigs... '89 F350, an Excursion, and a '99 F350. Combined with new rod ends and drag links and ball joints and kingpins as applicable and reman steering box, they drive like new for a long time. New front springs on the excursion and the '99 helped also as they'd have new bushings.
Any rig that has an axle located with rubber bushings is subject to issues like these. I've not looked into the newer rigs with solid axles and coil spings, but am guessing the issues get more complicated as the bushings have to both pivot and twist, and polyurethane won't squish to allow a twist.
