It would be cool to see some non synchromesh transmissions introduced into the game with possibly a really old truck, like a 1941 chevy 1/2 ton or something, where the gears whine as if it were the reverse gear in the game currently.
No syncro on first and reverse on the Burnside stock three speeder would make sense seeing as full syncromesh on all gears wasn't readily available until the late fifties