Also available in Electric

MD Series

  • class
  • 6 & 7
  • medium duty
  • power
  • 220 - 300
  • max hp
  • torque
  • 560 - 660
  • lb. -ft max
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Mack’s heavy-duty toughness in a medium-duty truck.

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Legendary Durability.

120,000 PSI Yield Frame Rails1

Heavy-duty steel frame rails ensure years of dependable service.

Cabs Made from American Steel

Galvanized steel cab prevents corrosion and protects drivers.

Flat Back-of-Cab Rail Design

The flat-back design delivers clean electrical connections for easier body installation.

Built for a smooth, quiet ride.

Dual-Airbag Cab Suspension

The standard dual-airbag cab suspension system delivers serious comfort for drivers to help them finish each day strong.

Standard Rear Leaf Spring Suspension

The standard rear leaf spring suspension is engineered to take on heavy loads with ease.

Optional Maxlite AirRide Suspension

The optional AirRide suspension incorporates a dual-airbag design to soften bounces and bumps.

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Mack Truck Builder

Customize your own MD from the ground up with our digital truck builder experience.

Build My MD

Numerous wheelbase options.

With sizes from 12 to 23 feet, get the perfect wheelbase for your application.

150"

166"

186"

206"

221"

236"

251”

270"

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Comfort designed for drivers.


Built around the driver, our wraparound dash design puts highly visible controls within easy reach.

Dash Design


Tilt-telescopic steering column lets drivers adjust their comfort. Flat-bottom steering wheel gives drivers more room for entry/exit and operation.

Steering


Cab air suspension systems ensure smoothness and stability to help drivers stay comfortable on lengthy trips.

Suspension

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We invented the integrated powertrain.

Explore Powertrains

Harness the power of integrated uptime.

24/7 Roadside Assistance

Our OneCall® experts provide full-service support across North America.

Performance Tracking

The Geotab® system delivers intelligence and benchmarking to improve productivity.

Nationwide Dealer Network

More than 400 dealer locations across North America.

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Explore MD

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PREMIUM SEATING

The driver's seat features a standard air suspension to deliver all-day comfort for daily drivers.

PEEP WINDOW

Passenger peep window allows for greater visibility for changing lanes, backing up and right turns.

STEERING

Flat-bottom steering wheel gives drivers more room for entry/exit and operation.

POWDER-COATED DISC WHEELS

Standard powder-coated disc wheels deliver long-lasting durability.

GRATED STEPS

Full-width grated steel steps offer safer entry & exit.

READABLE GAUGES

Large digital gauges make key information easy to find.

Specs & Downloads

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Warranty & Protection Plans

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Purchase & Financing

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Base Configurations

CLASS

6 & 7

HORSEPOWER

220-300 – HP

TORQUE

560 – 660 LB.-FT

GVW

29,995 – 33,000 lbs.

Engines

DIESEL

Cummins B6.7
Efficiency Series

6.7 Liter
220 – 260 HP
520 – 660 lb-ft

DIESEL

Cummins B6.7
Performance Series

6.7 Liter
280 – 300 HP
660 lb-ft

BATTERY ELECTRIC

Learn More >

Transmissions

AUTOMATIC

Allison 2500 HS
Highway Series

6-speed
Fuel Sense NAS

AUTOMATIC

Allison 2500 RDS
Rugged Duty Series

6-speed
Fuel Sense Premium
Parking Pawl

AUTOMATIC

Allison 3000 RDS
Rugged Duty Series

6-speed
Fuel Sense Premium
PTO and Retarder Options

Axles

FRONT AXLE

Meritor

DRIVE AXLE

Meritor

Suspensions

LEAF

Mack Multi Leaf

AIR

Mack AL

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
120k PSI Steel Frame Rails1

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’s Seat Trim

Modura cloth upgrade seat upholstery

Passenger Seat Trim

Modura cloth upgrade seat upholstery

Downloads

Mack MD6
Mack MD7
Mack MD6 (FR)
Mack MD7 (FR)
Warranty

More than warranty protection. Peace of mind with complete coverage for the first year.

Explore Warranty

Protection Plans

Lock in parts and labor costs with plans that cover powertrains, after treatment systems, chassis, clutches and towing at today’s prices.

Explore Plans

Mack Financial Services provides the support you need to build your business.

Explore Financing

Current Offers

Once a Mack. Always a Mack.

We build trucks for a lifetime of hard work. That means a Mack Certified used truck is one of the best values on or off the road.

See Inventory

Mack Stories

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Serving Up a Growing Appetite for Mack

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How Mack trucks are tested for success

Intense testing means quality, excellence, and tough trucks

Read Article

1 Only available on MD7. MD6 features 110k PSI frame rails.

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