2021 Ram 3500 6.7L I6 Cummins HO Diesel towing capacity.

The 2021 6.7L I6 Cummins HO Diesel tows 23,000 - 37,100 lbs across diesel ho configurations, depending on cab, drivetrain, axle ratio, wheel class, GVWR, GCWR, and box configuration.

Find your towing capacity Look up your 2021 6.7L I6 Cummins HO Diesel configuration View full comparison chart Compare all 2021 Ram 3500 configurations Open year guide Return to the 2021 Ram 3500 overview

Built from the official Ram 2021 towing guide pages used for this engine page. Citations for 6.7L I6 Cummins HO Diesel are available below.

2021 Ram 3500
6.7L I6 Cummins HO Diesel RANGE
23,000 - 37,100 LBS
PEAK PAYLOAD
6,570 LBS
MAX GCWR
45,000 LBS
Towing data

2021 6.7L I6 Cummins HO Diesel towing capacity by configuration

Each row below is one published configuration from the 2021 Ram 3500 towing guide, showing towing capacity, payload, GVWR, GCWR, axle ratio, and wheel class.

CREW CAB 4x2 TRADESMAN W BOX 6'4" SRW
3.73 SRW 11,500 lbs 4,090 lbs 32,240 lbs 24,150 lbs Base 7,408 lbs Base F/R 4,463 lbs / 2,945 lbs GAWR F/R 5,500 lbs / 7,000 lbs 6 Spd Auto Aisin AS69RC · TRADESMAN · BOX (unspecified) p.1
CREW CAB 4x2 TRADESMAN W BOX 8'0" DRW
4.10 DRW 14,000 lbs 5,940 lbs 43,000 lbs 34,470 lbs Base 8,059 lbs Base F/R 4,686 lbs / 3,373 lbs GAWR F/R 5,500 lbs / 9,750 lbs 6 Spd Auto Aisin AS69RC · TRADESMAN · BOX (unspecified) p.1
3.73 DRW 14,000 lbs 5,940 lbs 41,600 lbs 33,070 lbs Base 8,059 lbs Base F/R 4,686 lbs / 3,373 lbs GAWR F/R 5,500 lbs / 9,750 lbs 6 Spd Auto Aisin AS69RC · TRADESMAN · BOX (unspecified) p.1
CREW CAB 4x2 TRADESMAN W BOX 8'0" SRW
3.73 SRW 12,000 lbs 4,450 lbs 33,670 lbs 25,560 lbs Base 7,552 lbs Base F/R 4,609 lbs / 2,943 lbs GAWR F/R 5,500 lbs / 7,000 lbs 6 Spd Auto Aisin AS69RC · TRADESMAN · BOX (unspecified) p.1
CREW CAB 4x2 TRADESMAN W RAMBOX 6'4" SRW
3.73 SRW 11,500 lbs 3,950 lbs 32,240 lbs 23,180 lbs Base 7,553 lbs Base F/R 4,485 lbs / 3,068 lbs GAWR F/R 5,500 lbs / 7,000 lbs 6 Spd Auto Aisin AS69RC · TRADESMAN · RamBox p.1
CREW CAB 4x4 TRADESMAN W BOX 6'4" SRW
3.73 SRW 11,800 lbs 4,020 lbs 32,580 lbs 23,650 lbs Base 7,783 lbs Base F/R 4,800 lbs / 2,983 lbs GAWR F/R 6,000 lbs / 7,000 lbs 6 Spd Auto Aisin AS69RC · TRADESMAN · BOX (unspecified) p.2
CREW CAB 4x4 TRADESMAN W BOX 8'0" DRW
4.10 DRW 14,000 lbs 5,590 lbs 43,000 lbs 34,120 lbs Base 8,413 lbs Base F/R 4,989 lbs / 3,424 lbs GAWR F/R 6,000 lbs / 9,750 lbs 6 Spd Auto Aisin AS69RC · TRADESMAN · BOX (unspecified) p.2
3.73 DRW 14,000 lbs 5,590 lbs 41,600 lbs 32,720 lbs Base 8,413 lbs Base F/R 4,989 lbs / 3,424 lbs GAWR F/R 6,000 lbs / 9,750 lbs 6 Spd Auto Aisin AS69RC · TRADESMAN · BOX (unspecified) p.2
CREW CAB 4x4 TRADESMAN W BOX 8'0" SRW
3.73 SRW 12,300 lbs 4,330 lbs 33,610 lbs 25,120 lbs Base 7,967 lbs Base F/R 4,957 lbs / 3,010 lbs GAWR F/R 6,000 lbs / 7,000 lbs 6 Spd Auto Aisin AS69RC · TRADESMAN · BOX (unspecified) p.2
CREW CAB 4x4 TRADESMAN W RAMBOX 6'4" SRW
3.73 SRW 11,800 lbs 3,880 lbs 32,580 lbs 23,000 lbs Base 7,919 lbs Base F/R 4,797 lbs / 3,122 lbs GAWR F/R 6,000 lbs / 7,000 lbs 6 Spd Auto Aisin AS69RC · TRADESMAN · RamBox p.2
MEGA CAB 4x4 BIG HORN W BOX 6'4" DRW
4.10 DRW 14,000 lbs 5,450 lbs 43,000 lbs 33,200 lbs Base 8,550 lbs Base F/R 5,014 lbs / 3,536 lbs GAWR F/R 6,000 lbs / 9,750 lbs 6 Spd Auto Aisin AS69RC · BIG HORN · BOX (unspecified) p.2
3.73 DRW 14,000 lbs 5,450 lbs 41,600 lbs 32,580 lbs Base 8,550 lbs Base F/R 5,014 lbs / 3,536 lbs GAWR F/R 6,000 lbs / 9,750 lbs 6 Spd Auto Aisin AS69RC · BIG HORN · BOX (unspecified) p.2
MEGA CAB 4x4 BIG HORN W BOX 6'4" SRW
3.73 SRW 12,300 lbs 4,140 lbs 32,710 lbs 24,080 lbs Base 8,158 lbs Base F/R 5,006 lbs / 3,152 lbs GAWR F/R 6,000 lbs / 7,000 lbs 6 Spd Auto Aisin AS69RC · BIG HORN · BOX (unspecified) p.2
MEGA CAB 4x4 BIG HORN W RAMBOX 6'4" SRW
3.73 SRW 12,300 lbs 3,980 lbs 32,710 lbs 23,300 lbs Base 8,319 lbs Base F/R 5,042 lbs / 3,277 lbs GAWR F/R 6,000 lbs / 7,000 lbs 6 Spd Auto Aisin AS69RC · BIG HORN · RamBox p.2
REGULAR CAB 4x2 TRADESMAN W BOX 8'0" DRW
4.10 DRW 14,000 lbs 6,570 lbs 45,000 lbs 37,100 lbs Base 7,433 lbs Base F/R 4,322 lbs / 3,111 lbs GAWR F/R 5,500 lbs / 9,750 lbs 6 Spd Auto Aisin AS69RC · TRADESMAN · BOX (unspecified) p.1
3.73 DRW 14,000 lbs 6,570 lbs 41,600 lbs 33,700 lbs Base 7,433 lbs Base F/R 4,322 lbs / 3,111 lbs GAWR F/R 5,500 lbs / 9,750 lbs 6 Spd Auto Aisin AS69RC · TRADESMAN · BOX (unspecified) p.1
REGULAR CAB 4x2 TRADESMAN W BOX 8'0" SRW
3.73 SRW 11,500 lbs 4,490 lbs 34,630 lbs 26,830 lbs Base 7,005 lbs Base F/R 4,283 lbs / 2,722 lbs GAWR F/R 5,500 lbs / 7,000 lbs 6 Spd Auto Aisin AS69RC · TRADESMAN · BOX (unspecified) p.1
REGULAR CAB 4x4 TRADESMAN W BOX 8'0" DRW
4.10 DRW 14,000 lbs 6,130 lbs 43,000 lbs 34,660 lbs Base 7,873 lbs Base F/R 4,693 lbs / 3,181 lbs GAWR F/R 6,000 lbs / 9,750 lbs 6 Spd Auto Aisin AS69RC · TRADESMAN · BOX (unspecified) p.2
3.73 DRW 14,000 lbs 6,130 lbs 41,600 lbs 33,260 lbs Base 7,873 lbs Base F/R 4,693 lbs / 3,181 lbs GAWR F/R 6,000 lbs / 9,750 lbs 6 Spd Auto Aisin AS69RC · TRADESMAN · BOX (unspecified) p.2
REGULAR CAB 4x4 TRADESMAN W BOX 8'0" SRW
3.73 SRW 11,800 lbs 4,370 lbs 34,540 lbs 26,020 lbs Base 7,427 lbs Base F/R 4,630 lbs / 2,797 lbs GAWR F/R 6,000 lbs / 7,000 lbs 6 Spd Auto Aisin AS69RC · TRADESMAN · BOX (unspecified) p.2
TONGUE LOAD CONV / 5TH-WHEEL
10% / 15%
Conventional vs. 5th-wheel/gooseneck
TRAILERING HARDWARE EQUIPMENT WEIGHT
75 / 70 / 250 LBS
Conventional / gooseneck / 5th wheel
HITCH THRESHOLDS TRAILER LIMITS
23k / 30k LBS
5th-wheel / gooseneck required above this weight
RATING METHOD STANDARD
SAE J2807
Industry tow-rating standard
VIEW ALL FINE PRINT
GUIDE FINE PRINT

Ground rules behind every 2021 Ram 3500 towing rating.

These guide rules define the payload, trailering hardware, and limits behind every 2021 Ram 3500 towing rating on this page.

FIG. 2021 LOAD Baseline Weights

Weights Ram already counted in every rating

  • Passenger weight: 300 lbs counted for driver + passengers.
  • Options weight: 100 lbs counted for factory-installed options.
  • Conventional tongue: 10% of gross trailer weight.
  • 5th-wheel / gooseneck tongue: 15% of gross trailer weight.
FIG. 2021 CALC Payload Formula

How Ram derives payload from base weight

  • Formula: Payload = GVWR - Base Weight
  • Values: Published as estimated values.
  • Rounding: nearest 10 lbs.
FIG. 2021 HITCH Hitch Loading

Hardware weight deducted from payload

  • Conventional hitch: 75 lbs of equipment weight.
  • Gooseneck: 70 lbs of equipment weight.
  • 5th wheel: 250 lbs of equipment weight.
FIG. 2021 LIMIT Commercial / Hitch Limits

Chassis-cab and heavy-trailer thresholds

  • Body-completion weight: 80 lbs per foot from end of cab to end of frame.
  • 5th-wheel required over: 23,000 lbs trailer weight.
  • Gooseneck required over: 30,000 lbs trailer weight.
FIG. 2021 STD Rating Standard

SAE J2807 compliance

  • Trailer Weight Rating and Tow Vehicle Trailering Weight are calculated as specified in SAE J2807.
FIG. 2021 WARN Warnings

Manufacturer safety warnings

  • Payload and Trailer Weight Rating are mutually exclusive.
  • GAWRs, GVWRs and GCWRs should never be exceeded.
  • Payload and GAWR should never be exceeded and must account for all of the above weights, including the appropriate trailering equipment and tongue weight.
FIG. 2021 NOTES Policy Notes

All published notes from the 2021 towing guide

  • Payload and Max Trailer Weights are ESTIMATED values. p.3
  • All values are shown in pounds unless otherwise stated. p.3
  • Payload and Max Trailer Weight values are rounded to the nearest 10lb. p.3
  • Payload = GVWR - Base Weight p.3
  • Payload and Trailer Weight Rating are mutually exclusive. p.3
  • GAWRs, GVWRs and GCWRs should never be exceeded. p.3
  • Trailer Weight Rating and Tow Vehicle Trailering Weight are calculated as specified in SAE J2807. p.3
  • Passenger Weight = 300 lb p.3
  • Options Weight = 100 lb p.3
  • Trailering Equipment Weight: 75 lb for Conventional Hitch, 70 lb for Gooseneck and 250 lb for 5th Wheel. p.3
  • Tongue weight: 10 percent of the gross trailer weight for Conventional Hitch, 15 percent of the gross trailer weight for a 5th Wheel or Gooseneck hitch. p.3
  • Payload and GAWR should never be exceeded and must account for all of the above weights, including the appropriate trailering equipment and tongue weight. p.3
  • Box Off Body Completion Weight = 80 lb per foot from end of cab to end of frame p.3
  • A fifth-wheel hitch is required for trailers over 23,000 lbs. p.3
  • A Gooseneck hitch is required for trailers over 30,000 lbs. p.3
  • Maximum Capability p.3
NOTES: These ground rules apply to every published towing and payload rating. Your specific truck configuration may have additional constraints.
Technical Audit

Data sources

These citations show the Ram guide pages used to build the 2021 6.7L I6 Cummins HO Diesel engine page and guide-rule notes.

Show source pages for the 6.7L I6 Cummins HO Diesel page
DOC_ID: ram-3500 DOCUMENT BASIS

2021 Ram 3500 Diesel HO Towing Guide

Audit Scope PAGES: 1-3