 The 5.4 engine pulls my horse trailer around like it's wasn't even there. I did put a 3" lift and 32.8" tall tires on it with a K&N filter charger system, under drive pullies, and a Jet power module. That combonation of add on's worked great and the ride and handling of this new suspension compaired to the TTB is great! I have been very pleased with this truck on and off the road.