Anybody know what the part number is for the little white cup the shifter sits in on an M6 transmission. My transmission keeps popping out of fourth, and when I pulled the shifter, I saw that the little cup was almost oval shaped on top (had some issues with a clutch going out on me at the track, so I'm guessing that's what caused it).

So if anyone knows the part number (and how to R/R it), please let me know.

Thanks!