I wore out the bearing on the pitman shaft on my '91 wrangler box and decided to rebuild that part of the steering box. I pulled everything successfully and easily and all the new seals and bearing went on smoothly but I can not get the top cover back on the box. It threads on and will screw on about 3 turns but then it becomes extremely hard to turn. I am using a allen wrench to keep the adjuster shaft from spinning. Any ideas of what I can do????