O.d.

Greg55_99 said

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

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That was likely in the shifter itself or the linkage. Doubtfully bent shifter fork because by then they were made of steel I believe. My point is more these are economy Transmissions built for economy cars and why would you want to build a high-performance motor and put an economy transmission thats Geared for economy? Like the previous poster just said it would probably work just great first second and third pretty much the same but you'd probably want to be a bit more careful using the overdrive gear with a high performance motor.