yes. one for each side of the robot. they have output shafts on both sides, so that you don't have to reverse the motor direction on one side of the robot in order to make them run in the same direction like you usually do. makes it run a lot straighter.
the extra output shafts on the trannies (the ones going towards the middle) power the winch. it should lift a little over (i think, but don't quote me on this) 300 pounds? in high gear. that would be 600 in low gear. it goes quite fast, raises at 30 inches/second.
you can't see the shifter, but its there. high gear is 14.5 feet/sec, low gear is 8.5 feet/sec
edit: check out the rest of the bot
here