I really can't say I know the answer to your question but no one else replied. I did notice when I put my trans back in that there is no key to index the lever. What I do know is that as the clutch disk wears, the fingers on the pressure plate stick out further thus decreasing the amount of free play between the T.O bearing. If you can't move the T.O. bearing back far enough to fully engage the clutch, you probably need a new clutch and pressure plate. Does that make any sense?
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