The upper bearing cup is a challenge. A special (rare) G.M. puller removes this tapered bearing cup and the adjuster race. Another technique is to weld a pair of one-inch string beads at opposite faces of the old cup. Carefully confine these beads and heat to the race cup, and do not damage the housing! As the beads cool, the cup collapses slightly and slides loose. Here, a new cup seats snugly with a cup driver tool and hydraulic press.