T-6 shift coupler bushings flats in holes

[Eric Lenius]

The repair bushings I got from Stoddard for a T-6 shift coupler have flats on the ID holes. Since the pin does not have flats, I am wondering about this feature. Is this to create interference with the pin?

[David Jones]

Worry not, you are probably correct in your surmise but I have replaced many of these and the end result is a better shifting linkage. Just do it.

[Mike Horton]

especially, in the later 900 cars (911, 912), this shape allows a little fore/aft movement, from the chassis/drivetrain and keeps harsh road bumps, from pulling the trans out of gear, they are intentional,

[Wes Bender]

I think the space the flats provide reduces the noise a bit too.

[Al Zim]

The oblong openings in the shift linkage bushings is to unload any pressure against the shift forks which reduces wear on the synchronizes.. al zim 2018/08/09