Picked up a really nice '49 Mercury overdrive transmission for my truck. Looking it over and noticed the governor cap was busted so I decide to remove it, the solenoid, and anything else that could get damaged kicking around the garage. So I unbolt the solenoid, give it a 1/4 turn to remove it and I felt the end twist off inside of the adapter plate/block that stops the planetary ring. It was so easy I have to believe it was already on the way out. But no problem, I'll just fish the busted piece out since I have to get a 12V solenoid anyway. Err... found one here for $265. That's over 2 1/2 times what I paid for the box itself. So the question is: Do you think I could just go full manual with everything? If you bypass the kickdown you're essentially making it a manual operation anyway (switch to turn the solenoid on) so seems like a short jump to just go with a carefully fabricated linkage there. At 27mph you could flip the lever, yank the OD handle and go. I'm thinking it could be a cable actuated arrangement using a cam, some bronze bushings and a return spring. It could easily be smaller than the solenoid too.