How do you drive trucks with auxiliary transmissions?

Answer

an auxiliary transmission is a second gear box basically all it does is split the gear ratios in the main box so if you have a 13 speed box and a 3 speed aux, it would give you 39 gears couple that with a 2 speed diff and you would go to 78 gears so as an example to start in first gear in both boxes. then change aux box to second then go to third in aux the next x change would be to 2nd in main box, and back to low in athen u split again with aux box , into second and third next shift main box to 3rd aux to low and ya just go back thru gears the exact opposite when changing down with so many gears you donot usually use them all that comes with experience some have one or two buttons on gear shift to split aux and some have extra gear stick

on a 5&4 transmission you go through the first set then reach your arm through the steering wheel and shift both levers at the same time the first one back to first and the second one to second and go back through the gears, change again to fist & third and so on and so forth. it takes getting used to.

First answer by ID1185474948. Last edit by Towtrucker. Contributor trust: 0 [recommend contributor]. Question popularity: 32 [recommend question]