Tractor test: Massey Ferguson 6470 Dyna-6 With the recent introduction of tractor transmissions such as Dyna-VT, Dyna-4 and the featured Dyna-6, MF certainly seems to have rediscovered its groove when it comes to pumping out new models. This profi test focuses on the four-cylinder 92kW/ 125hp MF6470, complete with six-step Dyna-6 semi-powershift gearbox. What traits stand out – positive, and not so positive?