This is the second time I have lost the mounting screw that mounts the Hurst Shifter Mounting Plate to the trans (three used).

This is the bottom most screw. This screw is exposed. The other two screws are under the shifter mechanism.

I tried lock-tight but the screw still backed out over the course of about a year.

The only thing I can think of is that the lock-Tight (red) does not work with steel threads into aluminum threads.

Anyone know if that's the case or do you have any suggestions?

Thanks
Frank