O.d.

This is my PERSONAL overdrive experience from 1978. My 77 Volare Road Runner I bought new off the lot with a 318 2 bbl and overdrive tranny. After about 3000 miles the tranny would lock up in gear between shifts. I had to pull over to the side of the road and whack the shifter around to get it out of gear. It happened multiple times. Eventually I swapped it out for a proper 4 speed. I'm sure after all of these years someone can chime in and tell me what was wrong but that was my experience with a factory new OD gearbox.

Greg