Why is there an open hole on the steering gear?
I was under my wife's 4Runner fixing her Sway bar, and I noticed the steering gear had an open cover, that looked like it would fit something in it. There was grease on it, and the parts immediately behind it. I checked the repair manual and it shows the hole there on the diagram, but it doesn't specify what it's for. What is this area, and how do I maintain, or fix if necessary?
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