1. Home
  2. Listings
  3. Trucks
  4. Mack

Mack 6 Speed Automatic Trucks with Cummins Engines For Sale

Close
Your Current Search
Industry
Trucks
Manufacturer
Mack
Transmission Type
Automatic
Transmission Speeds
6 Speed
Engine Manufacturer
Cummins
Click the to remove the filter.
Save Search
Email Alert
What's Save Search and Email Alert?
Narrow Your Search
Keyword Search
Search within the selected criteria
Equipment Type
Trucks (14)
Category
Cab & Chassis Trucks (1)Delivery / Moving / Straight / Box Trucks (2)Dump Trucks (1)Flatbed Trucks (2)Rollback Tow Trucks (1)Sewer / Septic Trucks (6)Water Trucks (1)
Make
Mack (14)
Model
Select a category to view available models.
Condition
Model Year
-
GVWR Category
Rear Axle
Single (11)Tandem (2)
Transmission Type
Automatic (14)
Transmission Speed
6 Speed (14)
Drive Train
Suspension Type
Cab Style
Regular Cab (3)
Fuel Type
Diesel (11)
Mileage
-
Horsepower
-
Price
-
Country
State / Region
Select a country to view available states.
Market Type
For Sale (14)

Shop Trucks by Category

Showing 1 - 14 of 14 Listings

1 - 14 of 14 listings
1 - 14 of 14 listings
Mack MD7 Single Axle Dump Truck - Cummins 300HP, 6 Speed Allison Rds Automatic

2024 Mack MD7 Single Axle Dump Truck - Cummins 300HP, 6 Speed Allison Rds Automatic

Newly Listed
$120,000 USD
CUMMINS 6.7,ALLISON AUTO,12KFRT,21KRR, 7936 MILES,ALU WHLS,14FT OXDUMP WITH SWING GATE,3 COAL DOORS,PINTLE PLATE,
ConditionUsed
Usage7,936 Miles
Duty ClassHeavy Duty Dump Truck
Upfit MakeOx Bodies
Horse Power300 HP
Engine ModelCummins B6.7
Transmission6 Speed Allison RDS Automatic
SuspensionSpring
Rear AxleSingle Axle
Rear End21,000 lb 4.56 ratio
Stock Number286032
MLS Number14096529
CategoryDump Trucks
Last Updated1/17/2026
Location
Buffalo, NY, US
Sold By
Hunter Truck
(716) 218-___  SHOW
NUMBERCall Seller
Email Seller
Save
Hunter Truck
Mack MD6 28 ft Box Truck - 235HP, 6 Speed Allison Rds Automatic, Swing Door, Liftgate

2022 Mack MD6 28 ft Box Truck - 235HP, 6 Speed Allison Rds Automatic, Swing Door, Liftgate

Recently Updated
$65,000 USD
Super Clean! Low 80,000 Miles, Cummins ISB 235 hp, Allison transmission, 26,000 GVW, 28' Box Van w/ Lift gate, Cruise, Power Windows,,
ConditionUsed
Usage2,067 Hours
Duty ClassMedium Duty Box Truck
Box Length28 ft.
Horse Power235 HP
Engine ModelCummins ISB
Drivetrain4x2
Transmission6 Speed Allison RDS Automatic
SuspensionAir Ride
Rear AxleSingle Axle
Rear End5.29 ratio
Door TypeSwing
Lining TypeAluminum
LiftgateYes
Stock Number2169
MLS Number13968859
CategoryDelivery / Moving / Straight / Box Trucks
Last Updated1/17/2026
Location
Rhome, TX, US
Sold By
Jordan Truck Sales of Texas, LLC
(855) 489-___  SHOW
NUMBERCall Seller
Email Seller
Save
Mack Granite 64BR MHD Tandem Axle Cab & Chassis Truck - Cummins, 350HP, 6 Speed Allison Rds Automatic

2020 Mack Granite 64BR MHD Tandem Axle Cab & Chassis Truck - Cummins, 350HP, 6 Speed Allison Rds Automatic

Contact for price
CAB TO END OF FRAME342 ",
ConditionUsed
Usage7,075 Hours
Duty ClassHeavy Duty Cab & Chassis Truck
Horse Power350 HP
Engine ModelCummins L9
Drivetrain6x4
Transmission6 Speed Allison RDS Automatic
SuspensionMack
Rear AxleTandem Axle
Rear End40,000 lb 4.63 ratio
Stock NumberC-37167
MLS Number14075120
CategoryCab & Chassis Trucks
Last Updated1/7/2026
Location
Montreal/ Ile-aux-noix/Toronto/NY, QC, Canada
Sold By
Gamache Truck Center
(833) 300-___  SHOW
NUMBERCall Seller
Email Seller
Save
Gamache Truck Center
Mack Granite GU533 Tandem Axle Flatbed Truck - 350HP, 6 Speed Automatic

2018 Mack Granite GU533 Tandem Axle Flatbed Truck - 350HP, 6 Speed Automatic

$71,500 USD
Used 2018 Mack Granite GU533 Heavy Duty Flatbed Truck for sale, 166,653 miles, 350 HP Cummins L9 diesel engine, 6-speed Allison automatic transmission, tandem rear axle, air ride suspension....
ConditionUsed
Usage166,653 Miles
Duty ClassHeavy Duty Flatbed Truck
Horse Power350 HP
Engine ModelCummins L9
Transmission6 Speed Automatic
SuspensionAir Ride
Rear AxleTandem Axle
Rear End40,000 lb 4.53 ratio
Stock Number718407
MLS Number13779802
CategoryFlatbed Trucks
Last Updated1/14/2026
Location
North Fond Du Lac, WI, US
Sold By
Penske Used Trucks
(855) 942-___  SHOW
NUMBERCall Seller
Email Seller
Save
Penske Used Trucks
Mack Granite GU533 Flatbed Truck - 350HP, 6 Speed Automatic

2020 Mack Granite GU533 Flatbed Truck - 350HP, 6 Speed Automatic

$81,000 USD
Used 2020 Mack Granite GU533 Flatbed Truck for sale, 134,483 miles, Cummins L9 350HP diesel engine, 6-speed Allison automatic transmission, heavy-duty single rear axle, 90-gallon fuel...
ConditionUsed
Usage134,483 Miles
Duty ClassHeavy Duty Flatbed Truck
Horse Power350 HP
Engine ModelCummins L9
Transmission6 Speed Automatic
Rear AxleSingle Axle
Rear End40,000 lb
Stock Number718621
MLS Number14062765
CategoryFlatbed Trucks
Last Updated1/4/2026
Location
North Fond Du Lac, WI, US
Sold By
Penske Used Trucks
(855) 942-___  SHOW
NUMBERCall Seller
Email Seller
Save
Penske Used Trucks
IN STOCK - 2025 Mack MD7 Sewer / Septic Truck - Iron-Vac 2500 Gallon Tank Body

IN STOCK - 2025 Mack MD7 Sewer / Septic Truck - Iron-Vac 2500 Gallon Tank Body

$154,993 USD
THIS UNIT IS CURRENTLY IN STOCK 2025 Mack MD7 (2 YR Manufacturer Warranty) Cummins 6.7L (300HP) 2500 Allison Automatic Transmission 33k GVWR 2500 Gallon Stainless SteelTank (5 YR...
Warranty
ConditionNew
Duty ClassHeavy Duty Sewer / Septic Truck
Upfit TypeTank Body
Upfit MakeIron-Vac
Upfit Model2500 Gallon
Horse Power300 HP
Engine ModelCummins 6.7L
Drivetrain4x4
Transmission6 Speed Allison RDS Automatic
SuspensionAir Ride
Rear AxleSingle Axle
Rear End5.57 ratio
Capacity2500 Gallons
Stock Number1M2MDBAB8RS074507
MLS Number13635786
CategorySewer / Septic Trucks
Last Updated11/4/2025
Location
Searcy, AR, US
Sold By
SepticTrucks.com
(501) 279-___  SHOW
NUMBERCall Seller
Email Seller
Save
SepticTrucks.com
IN STOCK - 2025 Mack MD7 Sewer / Septic Truck - Iron-Vac 2500 Gallon Steel Tank Body

IN STOCK - 2025 Mack MD7 Sewer / Septic Truck - Iron-Vac 2500 Gallon Steel Tank Body

$155,974 USD
THIS UNIT IS CURRENTLY IN STOCK 2025 Mack MD7 (2 YR Manufacturer Warranty) Cummins 6.7L (300HP) 2500 Allison Automatic Transmission 33k GVWR 2500 Gallon Stainless SteelTank (5 YR...
Warranty
ConditionNew
Duty ClassHeavy Duty Sewer / Septic Truck
Upfit TypeTank Body
Upfit MakeIron-Vac
Upfit Model2500 Gallon
Horse Power300 HP
Engine ModelCummins 6.7L
Transmission6 Speed Allison RDS Automatic
SuspensionAir Ride
Rear AxleSingle Axle
Capacity2500 Gallons
Stock Number1M2MDBAB4SS075904
MLS Number13642840
CategorySewer / Septic Trucks
Last Updated10/31/2025
Location
Searcy, AR, US
Sold By
SepticTrucks.com
(501) 279-___  SHOW
NUMBERCall Seller
Email Seller
Save
SepticTrucks.com
IN STOCK - 2025 Mack MD6 Sewer / Septic Truck - Iron-Vac 2100 Gallon Polished Aluminum Tank Tank Body

IN STOCK - 2025 Mack MD6 Sewer / Septic Truck - Iron-Vac 2100 Gallon Polished Aluminum Tank Tank Body

$159,029 USD
THIS UNIT IS CURRENTLY IN STOCK 2025 Mack MD6 (2 YR Manufacturer Warranty) Cummins 6.7L (300HP) 2500 Allison Automatic Transmission 26k GVWR 2100 Gallon Polished Aluminum Tank (5 YR...
Warranty
ConditionNew
Duty ClassMedium Duty Sewer / Septic Truck
Upfit TypeTank Body
Upfit MakeIron-Vac
Upfit Model2100 Gallon Polished Aluminum Tank
Horse Power300 HP
Engine ModelCummins 6.7L
Transmission6 Speed Allison RDS Automatic
SuspensionAir Ride
Rear AxleSingle Axle
Rear End5.57 ratio
Capacity2100 Gallons
MLS Number13703507
CategorySewer / Septic Trucks
Last Updated10/31/2025
Location
Searcy, AR, US
Sold By
SepticTrucks.com
(501) 279-___  SHOW
NUMBERCall Seller
Email Seller
Save
SepticTrucks.com
IN STOCK - 2025 Mack MD7 Sewer / Septic Truck - Iron-Vac 2500 Gallon Steel Tank Body

IN STOCK - 2025 Mack MD7 Sewer / Septic Truck - Iron-Vac 2500 Gallon Steel Tank Body

$155,019 USD
THIS UNIT IS CURRENTLY IN STOCK 2025 Mack MD7 (2 YR Manufacturer Warranty) Cummins 6.7L (300HP) 2500 Allison Automatic Transmission 33k GVWR 2500 Gallon Stainless SteelTank (5 YR...
Warranty
ConditionNew
Duty ClassHeavy Duty Sewer / Septic Truck
Upfit TypeTank Body
Upfit MakeIron-Vac
Upfit Model2500 Gallon
Horse Power300 HP
Engine ModelCummins 6.7L
Transmission6 Speed Allison RDS Automatic
SuspensionAir Ride
Rear AxleSingle Axle
Rear End5.57 ratio
Capacity2500 Gallons
Stock Number1M2MDBABXSS075907
MLS Number13642852
CategorySewer / Septic Trucks
Last Updated10/31/2025
Location
Searcy, AR, US
Sold By
SepticTrucks.com
(501) 279-___  SHOW
NUMBERCall Seller
Email Seller
Save
SepticTrucks.com
IN STOCK - 2024 Mack MD7 Sewer / Septic Truck - Iron-Vac 2500 Gallon Tank Body

IN STOCK - 2024 Mack MD7 Sewer / Septic Truck - Iron-Vac 2500 Gallon Tank Body

$148,118 USD
THIS UNIT IS CURRENTLY IN STOCK (PRICE REDUCED) 2024 Mack MD7 (2 YR Manufacturer Warranty) Cummins 6.7L (300HP) 2500 RDS Allison Automatic Transmission 33k GVWR 2500 Gallon SteelTank (5 YR...
Warranty
ConditionNew
Duty ClassHeavy Duty Sewer / Septic Truck
Upfit TypeTank Body
Upfit MakeIron-Vac
Upfit Model2500 Gallon
Horse Power300 HP
Engine ModelCummins 6.7L
Transmission6 Speed Allison RDS Automatic
SuspensionAir Ride
Rear AxleSingle Axle
Rear End5.57 ratio
Capacity2500 Gallons
MLS Number13879362
CategorySewer / Septic Trucks
Last Updated11/20/2025
Location
Searcy, AR, US
Sold By
SepticTrucks.com
(501) 279-___  SHOW
NUMBERCall Seller
Email Seller
Save
SepticTrucks.com
Mack MD6 26 ft Box Truck - 260HP, 6 Speed Allison Rds Automatic, Liftgate

2022 Mack MD6 26 ft Box Truck - 260HP, 6 Speed Allison Rds Automatic, Liftgate

$69,900 USD
Single Axle, 26' Marathon Van Body, 2,500 LB "Waltco" Lift Gate, Under CDL, B6.7 Cummins 260 HP, Allison Automatic 6 Speed, 5.57 Ratio, Engine Brake, Air Ride, 268" WB, 10K FA, 17K RA,...
ConditionUsed
Usage3,974 Hours
Duty ClassMedium Duty Box Truck
Box Length26 ft.
Horse Power260 HP
Engine ModelCummins B6.7
Transmission6 Speed Allison RDS Automatic
SuspensionAir Ride
Rear AxleSingle Axle
Rear End17,000 lb 5.57 ratio
LiftgateYes
Stock NumberNS004267
MLS Number13124198
CategoryDelivery / Moving / Straight / Box Trucks
Last Updated10/10/2025
Location
Chatham, VA, US
Sold By
J&J Truck Sales
(844) 305-___  SHOW
NUMBERCall Seller
Email Seller
Save
J&J Truck Sales
Mack MD6 2000 Gallon Water Truck - Cummins 280HP, 6 Speed Allison Rds Automatic

2025 Mack MD6 2000 Gallon Water Truck - Cummins 280HP, 6 Speed Allison Rds Automatic

Contact for price
NEW TIGER MFG. 2,000 GAL. (5) SPRAY WATER TANK SYSTEM, (2) FRONT, (1) DRIVER SIDE, (2) REAR SPRAY HEADS, SELF LOADING/PRIMING PUMP (HYDRAULIC DRIVEN), HOSE REEL WITH 50’ OF 1 ½” HOSE AND...
ConditionNew
Duty ClassMedium Duty Water Truck
Upfit MakeTiger
Horse Power280 HP
Engine ModelCummins ISB6.7
Transmission6 Speed Allison RDS Automatic
SuspensionLeaf Springs
Rear AxleSingle Axle
Capacity2000 Gallons
Stock Number0000Stock8
MLS Number13712012
CategoryWater Trucks
Last Updated9/25/2025
Location
Abilene, TX, US
Sold By
Circle D Truck Sales, Inc.
(833) 568-___  SHOW
NUMBERCall Seller
Email Seller
Save
Circle D Truck Sales, Inc.
2025 Mack MD6 Sewer / Septic Truck - Iron-Vac 2100 Gallon Steel Tank Body

2025 Mack MD6 Sewer / Septic Truck - Iron-Vac 2100 Gallon Steel Tank Body

Contact for price
2025 Mack MD6 (pricing subject to change) 6.7L Cummins Engine (300HP) Allison 6 Speed Automatic Transmission 26k GVWR 2100 Gallon Steel Tank Battioni Ballast 11000 (393 CFM) Chrome...
Warranty
ConditionNew
Duty ClassMedium Duty Sewer / Septic Truck
Upfit TypeTank Body
Upfit MakeIron-Vac
Upfit Model2100 Gallon Steel
Horse Power300 HP
Engine ModelCummins 6.7L
Transmission6 Speed Allison RDS Automatic
SuspensionAir Ride
Capacity2100 Gallons
MLS Number13090570
CategorySewer / Septic Trucks
Last Updated6/9/2025
Location
Searcy, AR, US
Sold By
SepticTrucks.com
(501) 279-___  SHOW
NUMBERCall Seller
Email Seller
Save
SepticTrucks.com
2025 Mack MD642 Rollback Tow Truck - Jerr-Dan Rollback Towing Body, New, Arizona, Automatic IN STOCK

2025 Mack MD642 Rollback Tow Truck - Jerr-Dan Rollback Towing Body, New, Arizona, Automatic IN STOCK

Contact for price
New Mack rollback tow truck for sale at Midco Sales. Key Specs: Mack MD642, Cummins diesel 300HP, automatic transmission, Jerr-Dan 22' steel deck, 8k winch, wheel lift. CHASSIS SPECS, Mack...
ConditionNew
Usage183 Miles
Duty ClassMedium Duty Rollback Tow Truck
Upfit TypeRollback Towing Body
Upfit MakeJerr-Dan
Bed Length22 ft.
Horse Power300 HP
Engine ModelCummins B6.7
Drivetrain4x2
Transmission6 Speed Allison RDS Automatic
SuspensionAir Ride
Rear AxleSingle Axle
Rear End17,000 lb
WinchYes
Stock NumberT14850
MLS Number13227217
CategoryRollback Tow Trucks
Last Updated12/6/2024
Location
Chandler, AZ, US
Sold By
Midco Sales
(833) 298-___  SHOW
NUMBERCall Seller
Email Seller
Save
Midco Sales
Save Search
Email Alert
What's Save Search and Email Alert?
Want to narrow or modify your search criteria?
Filter by Price
Filter by Year
Filter by Location
Filter by Model
Filter by Keyword
Modify your search
Did you find what you were looking for? Yes No