They are a forward control cab-over-engine type, where the driver sits in front of the axle.

The TerraPro is a forward control cab-over-engine with a low cab in front of the axle.

Mack builds their own major components (engines, transmissions, axles, and suspensions) and promotes an integrated design.

The TerraPro is available with two Mack diesels and a Cummins Westport natural gas engine.

It is a 659 cubic inches (10.8 L) overhead cam turbocharged inline six-cylinder diesel engine.

It is a 783 cubic inches (12.8 L) overhead cam turbocharged inline six-cylinder engine.

[3] The Cummins Westport L9N is a 543 cubic inches (8.9 L) turbocharged inline six-cylinder natural gas engine.

Manual transmissions have five or six main gears, extra ratios are made with different combinations of ranges.

The RDS is a fully automatic planetary gear transmission with a lock-up torque converter.

Dana-Spicer and Meritor supply air brakes, steering systems, driveshafts, and other components.

Mack powered axles have the drive carrier on top of the housing instead of the front of it like other manufacturers.

This lets the driveshafts be in line from the transmission to and between the axles at a higher level above the ground.

With the higher level above the ground the driveshafts and u-joints are less prone to dirt and damage, important in on/off road construction.

Single rear axles rated at 23,000 pounds (10,000 kg) are available from Mack and Meritor.

The Camelback has multiple leaves that rock above the bogey pivot then curve down and under the axles.

Vendor tandems from Chalmers, Hendrickson, Meritor, and RAYCO are rated at up to 46,000 pounds (21,000 kg).

Typically a rear crew can load loose material, bins with assist, oversize pieces, and small containers.

They commonly haul construction debris but refuse containers are also left at commercial sites.

The Massachusetts Bay Transportation Authority in Boston has two and three axle snowplow models.