today a mini patch has been installed from within the game (not the XMB) and now my H gears do not work in my Logitech G25, only if I change it to secuential.
My H-pattern does not work when I put a custom transmission in the Challenger SRT8. I haven't checked any others, but it is only 6 gears. I put in custom values to replicate the "stock" 6-speed transmission, since the one in the game is an auto.
i just had the same problem with fully customised transmission in nissan sileighty. with it installed i can only use sequential mode and the clutch doesn't work, but with the stock gearbox installed the 6 speed shifter and clutch work fine