Mack has built a 125-year history of hauling the supplies and equipment needed to keep America running. The versatile 2026 Mack MD7 builds on that legacy with flexible configurations and several drivetrain options. Our team at First Fleet Truck Sales shows you why it’s a great fleet addition.
A Capable and Dependable Workhorse
Power Where and When You Need It
Mack designed the MD7 to be a solid medium-duty truck that is excellent for vocational, refuse, and regional haul operations. With a GVWR of up to 33,000 pounds, you can configure your MD7 for a wide range of applications. Each one comes with Meritor axles and dependable Mack taper-leaf suspension.
The MD7 is powered by a Cummins B6.7 inline 6-cylinder diesel engine that delivers up to 260 hp and 660 lb-ft of torque. A 6-speed Allison 2500HS automatic transmission with Fuel Sense provides smooth shifting under normal operating conditions. Additional optional powertrain configurations include:
- Cummins B6.7 Performance Series engine
- Allison 6-speed 2500RDS transmission
- Allison 6-speed 3000RDS transmission
- All-electric MD Electric
8 Wheelbase Options
You can choose from eight wheelbase configurations ranging from 151 to 274 inches, making the MD7 one of the more customizable medium-duty trucks on the market. Available options provide a frame length ranging from 80 inches to 207 inches, extending behind the 107-inch cab. The chassis frame has an impressive 120,000 PSI yield strength. All standard wheelbase options come with axle capacities of 12,000 pounds up front and 21,000 in the rear.
Standard Features to Get the Job Done
Mack provides an integrated body builder feature that is prewired for quick connection to the Cummins and Allison systems. It also includes support from the Mack Body Builder Support Team through the Mack Body Builder Portal, making it easier to build the exact truck your fleet needs. Additional features that support productivity include:
- 50-gallon fuel tank
- 25L DEF tank
- Dual 760 CCA batteries
- Cummins engine brake with a dash switch
Car-Like Driver Comfort
You can almost forget you are in a truck when you climb into the air-conditioned steel cab of the very capable MD7. It is packed with features to keep drivers comfortable and focused on the road. As you settle into the high-back driver’s seat with air suspension and an adjustable lumbar module, you’ll notice a comfortable flat-bottomed steering wheel with tilt and telescoping adjustments. You’ll also have center and overhead consoles, a premium dash cluster, and both 12V and USB outlets to keep devices charged.
The Mack MD7 is a versatile and capable medium-duty truck backed by a solid reputation. Our team can help you build a truck that perfectly complements your local or regional operations. Contact First Fleet Truck Sales in Lake Worth Beach, FL, to upgrade your fleet with a new MD7.

