a lot of people confuse the six speed compound two stick with the quad(quadruplex) box for some reason they are totally different,,some even think the two stick has a "joey"box,the maxitorque main lever selects 1 through 5 and a neutral,the second stick selects lo-hi and reverse and a neutral,,you have five reverse speeds then via the main stick,to activate a power take off like on a tipper the second stick must be in neutral,,the main stick then selects the PTO pump speed,dont over speed the pto use third,the lo is only to be used with first gear on the main,,its not a splitter type transmission.,all your shifts on constant mesh should be clutchless,the 15 speed road ranger you mostly use the top eight gears,deep reduction is off road heavy haul stuff.