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The original steering worm design was meant to have a tight spot in the straight ahead position with increased clearance (play) towards lock. Unfortunately the original design very rarely worked out this way. Usually the tight spot is just off to one side. With modern computer controlled 5 axis machining centres now available we have designed a new type of worm, we call it our constant clearance worm, which is exactly as you may expect. It has no tight spot, nor does it have increased clearance on lock. In fact it is as close to a steering rack as you may wish to get. Like a steering rack it has the same feel and clearance on full lock as it does in the straight ahead. This design fits directly into any original (not reproduction) raised lid steering box with no modifications necessary.
This standard ratio has 3 1/4 turns lock to lock as original.