The concrete truck that delivers here is a Pete with a Silver Detroit. The first time I heard it I said "that's a Dee-troit boys". 7% 7 mile grade & when we hear it down in the valley coming up we know there's enough time to finish your cup of coffee take a leak and get ready, no hurry. He says he pins it at 2200 at the bottom and crawls up. I got behind him once in the mighty 36hp mini truck and had to slow down, but not enough grunt to pass.