The 4.0L OHV engine was used from 1990 through 2000, and the 8th digit of the vehicle’s VIN will be an "X". The 4.0L SOHC was used from 1997 through 2011, and the 8th digit of the vehicle’s VIN will be either "E" or "K". The "E" code is a standard gasoline design, and the "K" is a flex-fuel design.
Tom Dayton
JS Auto Supply