Vehicle with chassis height adjustment

A suspension module for supporting a vehicle chassis on a wheel of the vehicle, the suspension module comprising:

• a spindle pivotably connected to an axle on the vehicle chassis with a pivot element on the axle defining a substantially vertical pivot axis, the spindle comprising a lower attachment member and an upper attachment cap separated by a space, wherein outer ends of the lower attachment member and outer ends of upper cap are rigidly interconnected by a pair of lift cylinders, the spindle further comprising a mid plate extending between the lift cylinders intermediate the lower attachment member and upper cap with the pivot element received between the lower attachment member and mid plate, and wherein each of the pair of lift cylinders comprises a ram movable within a housing of the lift cylinder;
• a wheelbox mounted to the wheel and slidingly coupled with the spindle, wherein the spindle is configured to move between a standard operating position and a high clearance operating position relative to the wheelbox;
• first and second strut rods connecting the wheelbox with the ram of a first one of the pair of lift cylinders, and third and fourth strut rods connecting the wheelbox with the ram of a second one of the pair of lift cylinders, wherein the strut rods are configured to extend from the respective lift cylinder to allow the spindle to move relative to the wheelbox while also transferring pivot torque between the wheelbox and the spindle;
• and
• a pneumatic circuit configured to move each of the rams within the respective housing of each of the lift cylinders to move the vehicle up or down between the high-clearance and low-clearance positions.