You can have an auto-clutch in all the cars.

Okay, well I may have been wrong about what's going on... After playing with it some more, the auto clutch seems to work fine on the H pattern cars; I can upshift and downshift at any time.

The auto clutch works on the sequential shift boxes as well, but I don't seem to be able to downshift if I'm using more than say 1/2 throttle.. Is this just typical of normal sequential shifters, that you have to take your foot off the gas to shift gears?

Oh, maybe this behavior is only with the cars that don't have the ignition cut feature -- the ones that do have it are unloading the trans when I shift and that's why they work?

I guess I'm learning a bit about racing transmissions as I go