Quote:
Originally Posted by Great Lakes Greg
My two cents is the sector gets worn only on the two teeth, where the worm gets worn all the way around. Seen as how the lash between the two is adjusted tight in the middle and the full left / right lock is engineered to be looser, I don't think wear on the worm is important when it can be adjusted out on center by the normal procedure. I am sure opinions will vary.
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Your logic seems reasonable with the exception that much of the wear of a steering gearbox comes from rotating the steering wheel less than 90° from center in either direction, -so the worm never really gets worm completely. This is the same reasoning why the steering arm balls and the pitman arm ball always wear excessively in the 3 & 9 position instead of in a complete circle. What happens when adjusting the worm when worn in the center is if the backlash is adjusted out to compensate for the wear in the center, the clearance becomes too tight (i.e.: binds) when the sector teeth reach the ends of the worm.