The unibody chassis on Jeep Cherokee XJ models is constructed of multiple sheet metal layers that are formed and spot welded together. When subjected to the torsional forces that occur off-road, the chassis develops small fatigue fractures in high stress locations.

The power steering gear mount is particularly vulnerable, due to the tremendous leverage required to control large tires in off-road conditions. Making matters worse, the steering gear is attached to the chassis with bolts and sleeves made of dissimilar metals. As a result, they often fuse together from corrosion, making it virtually impossible to detect a loose mounting bolt.

Once failure occurs, there simply is no easy or inexpensive solution. And without steering control, driving the vehicle to a repair facility just isn't an option.