Hello Guest, welcome to the initial stages of our new platform!
You can find some additional information about where we are in the process of migrating the board and setting up our new software here
Thank you for being a part of our community!
ONly J/P marked overdrive on m46 I ever saw was on a 16v car. I don't know the size of the shaft hole is but yeah P has bigger shaft hole then J. Curious what the P/J size shaft hole is.