Got the truck rolling. Really happy with the power and mpg. Avg 8.0 which is great. Truck weighs 20k, single axle got to be careful not to overload but for what i use it for it's perfect. Hendrickson air ride is a nice stable air ride. The cummins motor performs great so far, truck has 12k. my international max force had all sorts of emission issues at the same point. Allison transmission is nice, its just weird not shifting. only think im not crazy about is the cummins exhaust brake, kicks the truck into 4th , drives the rpms way up and takes 5 sec to engage. That normal?