Might want to check the sticker. I've never seen a Max Tow that didn't have 3.73 gears and towing mirrors. Do they put 36 gallon tanks in trucks with the 5.5' bed? Thought that was only an option with the 6.5' bed.
That strikes me as a good deal in today's market and that's a great-looking pickup.
Max tow has been 3.55 rear with the 3.5 eco for a while now. In fact the only way you can get 3.73 with the 3.5 is with the heavy duty payload package. 36 gallon tank comes standard with max tow regardless of bed length. Tow mirrors are a separate option with or without max tow.