Posted 18 hours ago · Report post Nope, just a different transmission. I did the math in another post but it seems to have been ignored. The Opticruise GRSO 905R is the fastest transmission for this truck. It sacrifices some heavy load capability, but the 730 HP engine makes up for that with pure grunt. Share this post Link to post Share on other sites
Posted 13 hours ago · Report post Without modding it is the Volvo with the 750 hp engine and the 12 + 2 transmission Share this post Link to post Share on other sites
