The Transmission Control Module (TCM) on a 1998 Chrysler LHS is typically located
under the center console. However, accessing it will require removing the center console components. It's not readily visible without some disassembly.
It's best to consult a repair manual specific to your 1998 Chrysler LHS for precise location and removal instructions. A Haynes or Chilton manual would be helpful. Incorrect removal can damage wiring harnesses or other components.