That's interesting CD. We run five Volvo trucks, three main ones and couple of older roughies, but they just keep on working.
We recently bought what is called an FM 12, which also runs the d12 engine, rated at 420 hp, with Volvo gearbox and Volvo diffs. It has all air bag suspension, truck and trailer, with disc brakes on all axles. It is a beautiful truck to drive, not that I get to spend much time in it.
RnR.