Well I know on the claas ares and the new Hollands with the electric clutches and + - buttons to go through the ranges and power shifts you can re calibrate the gear box, on the class you rev it at 1200rpm, hold the 4wd button down, put the reverser shuttle in forward and the computer starts flashing forwards and backwards repeatedly, the tractor doesn't move but the engine does accelerate and decelerate and you can hear and feel its doing stuff in the gearbox, when it's done the claas responds better on the clutch and is smoother through all the gears.. I was wondering if this could be done on the 6920, as it feels like the power shifts are a little violent when changing at times, the way it feels is, if it where on the class, you would re-calibrate the box. Wondering if anyone had any clues. Thanks!