The XJ was built as a uni-body frame and was in the years of 1984-2001 it had several models including 2 door and 4 door models. There was a body upgrade in the 1997 year which stayed the same until the end of the line in 2001. Many consider this the ultimate SUV style off-road vehicle. It had a bulletproof uni-body suspension, great and easy to upgrade axles, and a stable drive train with the reliable 4.0 motor, long lasting transmission, and capable New Process transfer case.