mystery of the intermediate shaft gear

[henry bugay]

It is obvious that someone has been into my engine before me. the intermediate shaft gear with the marking "0" or "1" is my next problem to solve. my car is a 73 1/2 911T with CIS injection. When we opened the engine up we noted that the gear was marked "1" had unusual wear upon it. I am not sure that my mechanic knows whether this is car takes an "0"gear or the "1" and my trusty How to Rebuild Book is at the mechanic shop---a made a gift of it to him because I wanted him to consider some of the points there.

MY QUESTION is this; How do I determine what the proper gear should be? It seems to me that just because there is a "1" gear there that that may not be the appropriate one as my mechanic assumes since others have journeyed before us. Is there some definite way to tell before I begin the rebuild process?

[Wayne 962]

The case should have a marking - it's noted where in the book, and also, you can measure the backlash using the setup shown in the book...

-Wayne