1. Home
  2. For Sale
  3. Trucks
  4. Mack
  5. Used

Used Mack 6 Speed Tri Axle Trucks For Sale

Close
Your Current Search
Industry
Trucks
Manufacturer
Mack
Rear Axle
Tri
Transmission Speeds
6 Speed
Condition
Used
Market Type
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 (12)
Category
Dump Trucks (12)
Make
Mack (12)
Model
Select a category to view all available models.
Condition
Used (12)
Model Year
-
GVWR Category
Heavy Duty (12)
Rear Axle
Tri (12)
Transmission Type
Transmission Speed
6 Speed (12)
Drive Train
8x4 (7)
Suspension Type
Cab Style
Regular Cab (7)
Fuel Type
Diesel (12)
Mileage
-
Horsepower
-
Price
-
Country
United States (12)
State / Region
Select a state below and click Refine Results.
Market Type

Shop Trucks by Category

Showing 1 - 12 of 12 Listings

1 - 12 of 12 listings
1 - 12 of 12 listings
Mack Granite 84FR Tri Axle Dump Truck - MP7 425HP, 6 Speed Allison Rds Automatic, 17' Dump

2021 Mack Granite 84FR Tri Axle Dump Truck - MP7 425HP, 6 Speed Allison Rds Automatic, 17' Dump

Newly Listed
$149,900 USD
Triaxle, 17' Tebco Steel Dump w/54" Sides, MP7 Mack 425 HP, Allison Automatic 6 Speed, 3 Stage Engine Brake, HaulMaax, 18K FA, 46K RA, 13K Steerable L/A, 228" WB, 21'2" Bridge, Diff Lock,...
ConditionUsed
Usage330,165 Miles
Duty ClassHeavy Duty Dump Truck
Bed Length17 ft.
Horse Power425 HP
Engine ModelMack MP7
Transmission6 Speed Allison RDS Automatic
SuspensionHaulMaax
Rear AxleTri Axle
Stock NumberMM001717
MLS Number14255519
CategoryDump Trucks
Last Updated3/19/2026
Location
Chatham, VA, US
Sold By
J&J Truck Sales
(844) 305-___  SHOW
NUMBERCall Seller
Email Seller
Save
J&J Truck Sales
Mack Granite 84FR Tri Axle Dump Truck - MP7 425HP, 6 Speed Allison Rds Automatic, 17' Dump

2021 Mack Granite 84FR Tri Axle Dump Truck - MP7 425HP, 6 Speed Allison Rds Automatic, 17' Dump

Newly Listed
$149,900 USD
2021 Mack GRANITE 84FR --- Tri Axle, MP7 Mack 425 HP, Allison Automatic 6 Speed, 18,000 Front Axle, 46,000 Rear Axle, 228" Wheelbase, 21' 2" Bridge, Hendrickson Haulmaax, 3 Stage Engine...
ConditionUsed
Duty ClassHeavy Duty Dump Truck
Bed Length17 ft.
Horse Power425 HP
Engine ModelMack MP7
Drivetrain8x4
Transmission6 Speed Allison RDS Automatic
SuspensionHaulMaax
Rear AxleTri Axle
Rear End46,000 lb
MLS Number14250602
CategoryDump Trucks
Last Updated3/18/2026
Location
Chatham, VA, US
Sold By
Atkinson Truck Sales
(855) 804-___  SHOW
NUMBERCall Seller
Email Seller
Save
Atkinson Truck Sales
Mack Granite 84FR Tri Axle Dump Truck - MP7 425HP, 6 Speed Allison Tc10 Automatic, 17' Dump

2021 Mack Granite 84FR Tri Axle Dump Truck - MP7 425HP, 6 Speed Allison Tc10 Automatic, 17' Dump

Newly Listed
$149,900 USD
Tri Axle, MP7 Mack 425 HP, Allison Automatic 6 Speed, 18,000 Front Axle, 46,000 Rear Axle, 228" Wheelbase, 21' 2" Bridge, Hendrickson Haulmaax, 3 Stage Engine Brake, Air Brake, Differential...
ConditionUsed
Usage222,766 Miles
Duty ClassHeavy Duty Dump Truck
Bed Length17 ft.
Horse Power425 HP
Engine ModelMack MP7
Transmission6 Speed Allison TC 10 Automatic
SuspensionHaulMaax
Rear AxleTri Axle
Stock NumberMM001733
MLS Number14250413
CategoryDump Trucks
Last Updated3/18/2026
Location
Chatham, VA, US
Sold By
J&J Truck Sales
(844) 305-___  SHOW
NUMBERCall Seller
Email Seller
Save
J&J Truck Sales
Mack Granite 84FR Tri Axle Dump Truck - MP7 425HP, 6 Speed Allison Rds Automatic, 17' Dump

2020 Mack Granite 84FR Tri Axle Dump Truck - MP7 425HP, 6 Speed Allison Rds Automatic, 17' Dump

Newly Listed
$146,900 USD
Tri Axle, MP7 Mack 425 HP, Allison Automatic 6 Speed, 18,000 Front Axle, 46,000 Rear Axle, 228" Wheelbase, 21' 2" Bridge, Hendrickson, 3 Stage Engine Brake, Air Brake, Differential Lock, 17'...
ConditionUsed
Usage312,110 Miles
Duty ClassHeavy Duty Dump Truck
Bed Length17 ft.
Horse Power425 HP
Engine ModelMack MP7
Transmission6 Speed Allison RDS Automatic
SuspensionHendrickson
Rear AxleTri Axle
Stock NumberLM001257
MLS Number14250410
CategoryDump Trucks
Last Updated3/18/2026
Location
Chatham, VA, US
Sold By
J&J Truck Sales
(844) 305-___  SHOW
NUMBERCall Seller
Email Seller
Save
J&J Truck Sales
Mack Granite 84FR Tri Axle Dump Truck - MP7 425HP, 6 Speed Allison Rds Automatic, 17' Dump

2021 Mack Granite 84FR Tri Axle Dump Truck - MP7 425HP, 6 Speed Allison Rds Automatic, 17' Dump

Newly Listed
$149,900 USD
2021 Mack GRANITE 84FR --- Tri Axle, MP7 Mack 425 HP, Allison Automatic 6 Speed, 18,000 Front Axle, 46,000 Rear Axle, 228" Wheelbase, 21' 2" Bridge, Hendrickson Haulmaax, 3 Stage Engine...
ConditionUsed
Usage222,766 Miles
Duty ClassHeavy Duty Dump Truck
Bed Length17 ft.
Horse Power425 HP
Engine ModelMack MP7
Drivetrain8x4
Transmission6 Speed Allison RDS Automatic
SuspensionHaulMaax
Rear AxleTri Axle
Rear End46,000 lb
Stock Number001733
MLS Number14246483
CategoryDump Trucks
Last Updated3/14/2026
Location
Chatham, VA, US
Sold By
Atkinson Truck Sales
(855) 804-___  SHOW
NUMBERCall Seller
Email Seller
Save
Atkinson Truck Sales
Mack Granite 84FR Tri Axle Dump Truck - MP7 425HP, 6 Speed Allison Rds Automatic, 17' Dump

2020 Mack Granite 84FR Tri Axle Dump Truck - MP7 425HP, 6 Speed Allison Rds Automatic, 17' Dump

Newly Listed
$146,900 USD
2020 Mack GR84F --- Tri Axle, MP7 Mack 425 HP, Allison Automatic 6 Speed, 18,000 Front Axle, 46,000 Rear Axle, 228" Wheelbase, 21' 2" Bridge, Hendrickson Haulmaax, 3 Stage Engine Brake, Air...
ConditionUsed
Usage312,110 Miles
Duty ClassHeavy Duty Dump Truck
Bed Length17 ft.
Horse Power425 HP
Engine ModelMack MP7
Drivetrain8x4
Transmission6 Speed Allison RDS Automatic
SuspensionHendrickson HMX460
Rear AxleTri Axle
Rear End46,000 lb
Stock Number001257
MLS Number14245903
CategoryDump Trucks
Last Updated3/14/2026
Location
Chatham, VA, US
Sold By
Atkinson Truck Sales
(855) 804-___  SHOW
NUMBERCall Seller
Email Seller
Save
Atkinson Truck Sales
Mack Granite GU813 Tri Axle Dump Truck - 405HP, 6 Speed Allison Rds Automatic

2016 Mack Granite GU813 Tri Axle Dump Truck - 405HP, 6 Speed Allison Rds Automatic

Price Drop $124,900 USD
2016 Mack GU813 --- Tri Axle, MP7 Mack 405 HP, Allison Automatic 6 Speed, 20,000 Front Axle, 46,000 Rear Axle, 210" Wheelbase, 19' 8" Bridge, Camelback, Thick Frame, 2 Stage Engine Brake,...
ConditionUsed
Usage246,126 Miles
Duty ClassHeavy Duty Dump Truck
Upfit MakeOx Bodies
Horse Power405 HP
Engine ModelMack MP7
Drivetrain8x4
Transmission6 Speed Allison RDS Automatic
SuspensionCamelback
Rear AxleTri Axle
Rear End46,000 lb
Stock Number032681
MLS Number13665369
CategoryDump Trucks
Last Updated3/14/2026
Location
Chatham, VA, US
Sold By
Atkinson Truck Sales
(855) 804-___  SHOW
NUMBERCall Seller
Email Seller
Save
Atkinson Truck Sales
Mack Granite 64BR Tri Axle Dump Truck - MP7 425HP, 6 Speed Automatic, 16' Dump

2019 Mack Granite 64BR Tri Axle Dump Truck - MP7 425HP, 6 Speed Automatic, 16' Dump

Price Drop $134,900 USD
2019 Mack GR64B --- Tri Axle, MP7 Mack 425 HP, Allison Automatic 6 Speed, 4.19 Ratio, 20,000 Front Axle, 46,000 Rear Axle, 208" Wheelbase, 19' 5" Bridge, Camelback, Thick Frame, 3 Stage...
ConditionUsed
Usage13,655 Hours
Duty ClassHeavy Duty Dump Truck
Upfit MakeOx Bodies
Bed Length16 ft.
Horse Power425 HP
Engine ModelMack MP7
Drivetrain8x4
Transmission6 Speed Allison RDS Automatic
SuspensionCamelback
Rear AxleTri Axle
Rear End46,000 lb 4.19 ratio
Stock Number001589
MLS Number12487082
CategoryDump Trucks
Last Updated3/14/2026
Location
Chatham, VA, US
Sold By
Atkinson Truck Sales
(855) 804-___  SHOW
NUMBERCall Seller
Email Seller
Save
Atkinson Truck Sales
Mack Granite 84FR Tri Axle Dump Truck - MP7 425HP, 6 Speed Allison Rds Automatic, 17' Dump

2021 Mack Granite 84FR Tri Axle Dump Truck - MP7 425HP, 6 Speed Allison Rds Automatic, 17' Dump

$149,900 USD
Triaxle, 17' Tebco Steel Dump w/54" Sides, MP7 Mack 425 HP, Allison Automatic 6 Speed, 3 Stage Engine Brake, HaulMaax, 18K FA, 46K RA, 13K Steerable L/A, 228" WB, 21'2" Bridge, Diff Lock,...
ConditionUsed
Usage290,693 Miles
Duty ClassHeavy Duty Dump Truck
Bed Length17 ft.
Horse Power425 HP
Engine ModelMack MP7
Transmission6 Speed Allison RDS Automatic
SuspensionHaulMaax
Rear AxleTri Axle
Stock NumberMM001716
MLS Number14240746
CategoryDump Trucks
Last Updated3/12/2026
Location
Chatham, VA, US
Sold By
J&J Truck Sales
(844) 305-___  SHOW
NUMBERCall Seller
Email Seller
Save
J&J Truck Sales
Mack Granite 84FR Tri Axle Dump Truck - MP7 425HP, 6 Speed Allison Rds Automatic, 17' Dump

2021 Mack Granite 84FR Tri Axle Dump Truck - MP7 425HP, 6 Speed Allison Rds Automatic, 17' Dump

$149,900 USD
2021 Mack GRANITE 84FR --- Tri Axle, MP7 Mack 425 HP, Allison Automatic 6 Speed, 18,000 Front Axle, 46,000 Rear Axle, 228" Wheelbase, 21' 2" Bridge, Hendrickson Haulmaax, 3 Stage Engine...
ConditionUsed
Usage11,717 Hours
Duty ClassHeavy Duty Dump Truck
Bed Length17 ft.
Horse Power425 HP
Engine ModelMack MP7
Drivetrain8x4
Transmission6 Speed Allison RDS Automatic
SuspensionHaulMaax
Rear AxleTri Axle
Rear End46,000 lb
Stock Number001716
MLS Number14236779
CategoryDump Trucks
Last Updated3/11/2026
Location
Chatham, VA, US
Sold By
Atkinson Truck Sales
(855) 804-___  SHOW
NUMBERCall Seller
Email Seller
Save
Atkinson Truck Sales
Mack Granite GU713 Tri Axle Dump Truck - MP8, 6 Speed Allison Rds Automatic, 16' Dump

2017 Mack Granite GU713 Tri Axle Dump Truck - MP8, 6 Speed Allison Rds Automatic, 16' Dump

$139,500 USD
Triaxle, 16' Ox Steel Dump w/60" Sides, MP8 Mack, Allison Automatic 6 Speed, 4.73 Ratio, Camelback, Double Frame, 20K Pusher, 228" WB, 21'4" Bridge, Dual P/S Boxes, Diff Lock, Electric Tarp,...
ConditionUsed
Usage12,608 Hours
Duty ClassHeavy Duty Dump Truck
Upfit MakeOx Bodies
Bed Length16 ft.
Engine ModelMack MP8
Transmission6 Speed Allison RDS Automatic
SuspensionCamelback
Rear AxleTri Axle
Rear End4.73 ratio
Stock NumberHM036276
MLS Number13961715
CategoryDump Trucks
Last Updated3/6/2026
Location
Chatham, VA, US
Sold By
J&J Truck Sales
(844) 305-___  SHOW
NUMBERCall Seller
Email Seller
Save
J&J Truck Sales
Mack Granite 84FR Tri Axle Dump Truck - MP7 425HP, 6 Speed Allison Rds Automatic, 17' Dump

2021 Mack Granite 84FR Tri Axle Dump Truck - MP7 425HP, 6 Speed Allison Rds Automatic, 17' Dump

$149,900 USD
2021 Mack GRANITE 84FR --- Tri Axle, MP7 Mack 425 HP, Allison Automatic 6 Speed, 18,000 Front Axle, 46,000 Rear Axle, 228" Wheelbase, 21' 2" Bridge, Hendrickson Haulmaax, 3 Stage Engine...
ConditionUsed
Usage301,955 Miles
Duty ClassHeavy Duty Dump Truck
Bed Length17 ft.
Horse Power425 HP
Engine ModelMack MP7
Drivetrain8x4
Transmission6 Speed Allison RDS Automatic
SuspensionHaulMaax
Rear AxleTri Axle
Rear End46,000 lb
Stock Number001715
MLS Number13848819
CategoryDump Trucks
Last Updated10/16/2025
Location
Chatham, VA, US
Sold By
Atkinson Truck Sales
(855) 804-___  SHOW
NUMBERCall Seller
Email Seller
Save
Atkinson Truck 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