I was down at the dealer today and thought I would take a look at the 3/4 Ton Cummins trucks. I noticed that some have the 5 speed with the standard Cummins and some have the 6 speed with the H.O. Cummins. I am just curious what the differences are. I am wondering if the upgrades for the standard cummins are the same as the H.O. Cummins and was also wondering if the 5 speed could handle any more power going through it if one was to upgrade the motor.