My '94 allows me to experience death wobble on numerous occasions. AT 300,000 plus miles on the clock, is it possible to "tighten" the steering up, or must I replace the box itself? What is it about the PSC ( and others ) that everyone likes so well? I have priced them, and ones at NAPA, and like the price of NAPA's a whole lot better. What am I missing? Tie rod ends are tight, new steering stabilizer, DSS installed in Feb. HELP!