Wood needs to go, badly.
He's too fake, I highly doubt he's that stupid or hillbillyish in real life, he plays it up like a huge act. "Hehe I'm a fat stupid American! I like beer, NASCAR, incest, and flannel!" It's so fake. And I have no idea where you guys get the idea he knows cars. Based on the show so far, I'd say he knows as much (or as little as it were) as Adam, probably less.
I'm sure he's nice, and a great NASCAR commentator, but he's just a bad fit.
However, the real answer isn't available in your poll. Fake American Stig needs to go. No point, have Tanner do the tests. They don't use the stig for anything, and haven't built his character up, so drop him.
Otherwise, the show keeps improving little by little. I'm cautiously optimistic about Season 2, despite the show still being in a "Rut" as it were.
God, that was an awful pun.....