 Thank you, guys. I really like your show. I listen to it every chance I get. Anyway, what's going on with my little sub is wintertime. I put it in four-wheel drive and hit four high and get up around 40 miles an hour, and it'll start kind of vibrating. And I don't know if it's coming from the front differential or if it's coming from the transfer case. Only in four-wheel drive? Yeah, that's what I was going to ask.