Ive been fixing a barn find 62 Skylark with a 215/dual path 2-speed. First and reverse work but it doesn't shift into hi gear. I can find very little info on this weird tiny tranny. I know that ''high gear'' is really a lockup converter and 1st/reverse share a gear set and clutches, but how it shifts is a complete mystery. Does anyone here know enough about this trans to give insight into why its not shifting?