The weighted hose greatly reduces the buzz felt in the steering wheel and peddles but does nothing to reduce the vibration itself. It's a normal harmonic vibration of the Cummins. Isolating it from the cab is the best we can expect. I'm not real happy with the way the new hydroformed frame (tuning fork) resonates the vibrations through the cab. I wish I could have got the new motor in a 2002. But then again, with 24,000 miles on the motor, people in drive up windows are starting to ask me to shut it off so they can hear me. It's getting louder as the miles add up.