I have a 1991 XLT Explorer that I bought new and it still runs. I have rebuilt the A4LD trans several times and the engine at 150K In the first year I installed Tokico shocks and put on heaview sway bars - 1" in front and rear. I also upgraded to Goodyear Wrangler 245/75R15 tires. I now run Hancook. The sway and roll stopped. I can take a 45mph freeway exit at 60mph - no problem.