This 1990 Jeep Grand Cherokee XJ, a battle-tested California icon with a stout 4.0L inline-six and Selec-Trac, blends off-road grit with dependable road manners.

Welcome to the addictive world of one of the most-used and most-modified Jeeps. XJs were built for a long, long time, and many folks have changed them to suit their needs, from mild to wild. We've ...