Mack® MD Series

Engineered to endure.

Shift medium duty into high gear.

Mack is a player in the medium-duty market with our MD Series— Class 6 and 7 trucks that take care of the details so you can focus on growing your business.

Built for every job.

To handle different applications, the MD Series is available in two weight classes— the Class 6 MD6 and the Class 7 MD7. The trucks have innovative features that come standard, and they vary in wheelbase size and dimensions, with transmission options for heavier-duty applications and rougher terrains.

Built for comfort.

Every detail of the Mack MD interior was designed for one purpose: keep drivers comfortable. There's power steering, tilt telescopic steering column, an air suspension driver's seat, and controls within easy reach. If it all feels designed by drivers for drivers, that's because it was.

Built for uptime.

Our integrated package

of connected services combines proprietary vehicle telematics, live support personnel, case supervision, and remote updates to keep your fleet on the road and out of the shop.

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Geotab Telematics.

Our Geotab® system will provide the intelligence and data to help you operate with enhanced safety, cost-efficiency, and productivity.

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Find the Right Fit

Choose from a range of eight different wheelbase sizes – from 10 to 26 feet – to get the perfect size for your applications needs.

Driver Environment

Designed by drivers for the comfort of other drivers, the inside of an MD Series cab puts every last convenient detail right where it ought to be.


Highly Visible, Reachable Driver Controls

Make easy adjustments and see everything at a quick glance.


Cab Air Suspension

To ensure the kind of smoothness and stability that go a long way on lengthier trips.


Flat-Bottom Steering Wheel

An industry first, allowing more belly room and clearance for entry or exit.


Tilt Telescopic Steering Column

Puts the driver in control to position the wheel where it's most comfortable.


Each of our MD Series trucks come with a wide selection of upgrade options—for size, traction and power that feel custom made.

8 Different Wheel Bases

A range of sizes for typical body applications, 10 to 26 feet.

Allison Transmission Options

To cover any application, from the city to rougher terrains.

Industry Proven Powertrain Options

To deliver the kind of power every job requires.


Mack's service and technological touches keep you operating efficiently and on the go – to keep the wheels turning and your business growing.



Cummins B6.7
Inline 6-cylinder
Turbo/Intercooled Diesel

Horsepower/Torque Options

220 hp / 600 lb. Ft.
240 hp / 560 lb. ft.

Horsepower/Torque Options

250 hp / 660 lb. Ft.
260 hp / 660 lb. ft.

Horsepower/Torque Options

280 hp / 660 lb. Ft.
300 hp / 660 lb. ft.



Allison 2500HS 6-speed, double OD rated to 660 lb. ft. torque, w/Fuel Sense NAS


Allison 2500RDS 6-speed, double OD rated to 660 lb. ft. torque, w/Fuel Sense Premium


Allison 3000RDS 6-speed, double OD rated to 660 lb. ft. torque, w/Fuel Sense Premium

Standard Features

  • Air Conditioning
  • Cruise Control
  • Air Suspension Driver's Seat
  • AM/FM w/ Bluetooth
  • Console Cup Holders
  • Tilt & Telescopic Steering Column
  • Interior Courtesy Lighting
  • 12 Volt and USB Outlets
  • Flat-Bottom Steering Wheel
  • Bright Finish & Lower Convex Mirrors
  • Power Steering
  • Dual, Airbag Cab Suspension
  • Power Windows and Locks

Optional Features

Allison Upgrade

Fuel Sense 2.0 MAX

Battery Shut Off

Under cab, passenger side

Engine Block Heater

Added protection in frigid temperatures

Air Filter Indicator

Under hood, restriction indicator mounted to air cleaner

PTO Preparation Kit

Harness & switch kit

Cab Mirrors

Chrome finish & convex

Seat Passenger

Two-person bench seat w/vinyl & under seat storage

Driver Seat Trim

Modura cloth upgrade seat upholstery

Passenger Seat Trim

Modura cloth upgrade seat upholstery

Download Additional Information

MD6 Brochure
MD7 Brochure
MD6 Brochure (French)
MD7 Brochure (French)

Let’s talk

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