There is a preload adjustment. It is seldom needed with
power steering. It is the large screw with a locknut on top
of the box. You must be extremely careful to not over
adjust the screw. Have you checked to be sure all the
gearbox bolts are tight and that the rag joint is in good
condition. More often than not, gross play is a rag joint
problem. Your rag joint may be under a cover over the
column shaft a few inches from the gearbox. Have someone
turn the wheel back and forth while you watch to make sure
both halves of the shaft turn together - no slack permitted.
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