I'm guessing one of the reasons for such a high percentage of manual equipped 5. 9L turcks is that the owners who buy a truck with a manual transmission are a bit more serious about their vehicle, and more likely to visit a site like the TDR. The average guy who buys a truck off the lot with an automatic transmission is oblivious to places like this. I still find the poll interesting, and would like to see a bunch more 6. 9L votes.