This is how you change it:
1997 Mercury Grand Marquis LS
110K miles, Light Prairie Tan in and out. Replica HPP's, ceramic brakes, airbox mod, duals with Hooker Aero Chambers, OEM Cargo Box and J Mod with Spring Delete. 3.27 Trac-Lok, HPP front springs, HPP sways, P71 PCM.
2002 Dodge Ram 1500 Quad Cab SLT