Mack MD6 / MD7 (medium-duty)
Medium-duty conventional • Production 2020–present
About the Mack MD6 / MD7 (medium-duty)
The Mack MD6 (Class 6) and MD7 (Class 7) are Mack's re-entry into the medium-duty market — launched 2020 after a decades-long absence from the segment. Mack exited medium-duty in 2002 when Volvo (Mack's parent) consolidated medium-duty production with Renault Trucks in Europe. Re-entry in 2020 brought the iconic Mack bulldog branding back to Class 6-7 for the first time in 18 years. Built at the Roanoke Valley Operations plant in Virginia. Direct competitor to Freightliner M2 106/112, Kenworth T270/T370, Peterbilt 337/348, International MV.
Overview
The Mack MD6 (Class 6) and MD7 (Class 7) are Mack's re-entry into the medium-duty market — launched 2020 after a decades-long absence from the segment. Mack exited medium-duty in 2002 when Volvo (Mack's parent) consolidated medium-duty production with Renault Trucks in Europe. Re-entry in 2020 brought the iconic Mack bulldog branding back to Class 6-7 for the first time in 18 years. Built at the Roanoke Valley Operations plant in Virginia. Direct competitor to Freightliner M2 106/112, Kenworth T270/T370, Peterbilt 337/348, International MV.
Specifications
- Manufacturer
- Mack
- Class
- Class 6-7
- Vehicle type
- Medium-duty conventional
- Cab type
- Day cab, crew cab
- Production years
- 2020–present
- Applications
- Box truck, delivery, dump (light), utility, severe-duty service body
- Typical engines
- Cummins B6.7
- Typical transmissions
- Allison 2500/3000
- GVWR range
- 25,995-33,000 lb
Design and engineering
Conventional medium-duty cab with set-back front axle. Aluminum hood. Steel cab construction. Cummins B6.7 standard engine. Allison automatic standard. Crew cab option for utility/vocational work crews.
Generations and major changes
Market position and popularity
Slow but steady growth as Mack rebuilds the medium-duty dealer footprint. Major customers: utility companies, municipal fleets, severe-duty service bodies. Mack's strong vocational/refuse brand carries weight in commercial Class 6-7.
Who buys this truck
Utility companies, municipal fleets, severe-duty service bodies, dump/concrete contractors, refuse-adjacent operators wanting Mack brand.
Common problems and reliability notes
Cummins B6.7 DEF system issues (industry-wide). Mack medium-duty dealer network is still building — service coverage in some regions is thinner than Freightliner. Some early 2020-2021 MD trucks had cab squeaks/rattles addressed via TSBs.
Pros and cons
✓ Pros
- • Mack brand strength in vocational/commercial
- • Cummins B6.7 proven engine
- • Allison automatic standard
- • Strong commercial fleet relationships from refuse heritage
⚠ Cons
- • Newer entry — dealer network still building
- • Less variety of body builder partnerships than Freightliner
- • Limited used market (too new)