Can a 2024 Ram 2500 Heavy Duty Laramie 4x4 Crew Cab 6ft4 Box Safely Tow a 12,000 lb Jayco Eagle HT 29.5BHDS Fifth Wheel?
Configured with the 6.7L Cummins Turbo Diesel I6 (370 hp / 850 lb-ft) and 3.73:1 axle ratio, this 2024 Ram 2500 Heavy Duty Laramie 4x4 Crew Cab 6ft4 Box carries a 2,190 lb (993 kg) FMVSS 110 B-pillar payload sticker and 27,770 lb SAE J2807 GCWR. Coupling a loaded 12,000 lb Jayco Eagle HT 29.5BHDS Fifth Wheel (9,890 lbs dry UVW) applies 2,160 lbs of raw coupling load (2,160 lbs net on truck), resulting in a 550 lb door-sticker payload overload (125% utilization).
Coupling load (2,160 lb raw / 2,160 lb net) counts against door payload.
2024 Ram 2500 Heavy Duty Laramie 4x4 Crew Cab 6ft4 Box Over-Axle Pin & RAWR Summary
In-bed fifth-wheel load check for 6.7L Cummins Turbo Diesel I6 (370 hp / 850 lb-ft) pulling Jayco Eagle HT 29.5BHDS Fifth Wheel:
MATRIX 2500 Heavy Duty Trailer Sensitivity (-20% to +20% Around 12,000 lbs)
2024 Ram 2500 Heavy Duty Laramie 4x4 Crew Cab 6ft4 Box Trailer Weight Sensitivity (3.73 Axle)
Five loaded weight steps around Jayco Eagle HT 29.5BHDS Fifth Wheel (9,890 lb dry UVW) with 340 lb cabin and 80 lb cargo fixed:
| Simulation Tier | Loaded Trailer | 18% Pin Load | Total Payload Used | Remaining Margin | Combined GCW | SAE J2807 Verdict |
|---|---|---|---|---|---|---|
| Light Camp Load (-20%) | 9,600 lbs | 1,728 lbs (1,728 net) | 2,308 / 2,190 lbs | -118 lbs (105%) | 17,990 / 27,770 lbs | OVERLOAD |
| Reduced Gear Load (-10%) | 10,800 lbs | 1,944 lbs (1,944 net) | 2,524 / 2,190 lbs | -334 lbs (115%) | 19,190 / 27,770 lbs | OVERLOAD |
| Nominal Target Rig (0% (Base)) | 12,000 lbs | 2,160 lbs (2,160 net) | 2,740 / 2,190 lbs | -550 lbs (125%) | 20,390 / 27,770 lbs | OVERLOAD |
| Full Water & Gear (+10%) | 13,200 lbs | 2,376 lbs (2,376 net) | 2,956 / 2,190 lbs | -766 lbs (135%) | 21,590 / 27,770 lbs | OVERLOAD |
| Heavy Stress Test (+20%) | 14,400 lbs | 2,592 lbs (2,592 net) | 3,172 / 2,190 lbs | -982 lbs (145%) | 22,790 / 27,770 lbs | OVERLOAD |
1. Heavy Cast-Iron 6.7L Cummins Block vs. 10,000 lb Class 2b Ceiling
Per the 2024 Ram Heavy Duty Towing & Payload Guide, the 6.7L inline-6 Cummins turbo-diesel uses a deep-skirt cast-iron block that brings a Ram 2500 Laramie 4x4 Crew Cab to 7,810 lbs curb weight under its strict 10,000 lb Class 2b GVWR - leaving 2,190 lbs on the yellow door placard. Coupling a loaded 12,000 lb mid-profile Jayco Eagle HT fifth wheel (2,160 lbs of 18% pin weight + 160 lb hitch + 420 lb cab/bed) reaches 2,740 lbs: a 550 lb GVWR overload (125% utilization).
2. Five-Link Rear Coil Suspension & 6,040 lb Rear GAWR Audit
Unlike Ford and GM 2500 trucks that use leaf springs, the Ram 2500 uses a five-link rear coil suspension (or optional Auto-Level Rear Air Suspension) rated at 6,040 lbs Rear GAWR. Under 2,160 lbs of over-axle kingpin load, estimated rear axle weight reaches 5,856 lbs - leaving +184 lbs under the 6,040 lb Rear GAWR but compressing standard rear coils significantly without air assist.
3. Exhaust Brake Downhill Control vs. Payload Reality
Thermally and mechanically, the 6.7L Cummins and variable-geometry turbocharger (VGT) exhaust brake control 20,390 lbs of combined GCW (+7,380 lbs below the 27,770 lb GCWR) down 7% mountain grades effortlessly. However, to stay inside the 2,190 lb door sticker with 580 lbs of passengers/gear/hitch, loaded 18% fifth-wheel weight must stay at or below 8,944 lbs - or buyers should step up to a Ram 3500 SRW (11,800–12,300 lb GVWR) for heavy fifth wheels.
4. 68RFE Six-Speed Line Pressure, TPMS Thresholds & Gen-Y / Goose Box Weight Savings
On 2024 Ram 2500 Cummins models paired with the 68RFE 6-speed overdrive transmission, locking Tow/Haul plus Full Automatic Exhaust Brake elevates hydraulic clutch line pressure in 4th and 5th gears to safeguard overdrive friction packs under heavy fifth-wheel drag. Notice Ram’s factory Tire Pressure Monitoring System triggers low-pressure alerts on rear LT275/70R18E tires below 65 PSI (with 80 PSI cold required for full axle capacity). Swapping a 160 lb rail-style fifth-wheel hitch for a Lippert-approved Reese Goose Box pin box on the factory Mopar under-bed gooseneck ball trims ~105 lbs off bed hardware.
Frequently Asked Questions (2024 Ram 2500 Heavy Duty Towing)
FAQ Why does a Ram 2500 6.7L Cummins have only ~2,190 lbs of door-sticker payload?
Every Ram 2500 is capped at 10,000 lbs GVWR to stay in federal Class 2b. Because the cast-iron 6.7L Cummins diesel and 4x4 Laramie Crew Cab weigh 7,810 lbs wet, subtracting 7,810 from 10,000 leaves 2,190 lbs of legal payload.
FAQ Does the Ram 2500 6ft4 short bed require a slider hitch for a fifth wheel?
Ram’s 6-foot-4 bed is 4 inches shorter than Ford/GM 6.75-foot short beds. While tapered-nose fifth wheels (like Jayco Eagle HT) can clear up to ~80 degrees with a fixed OEM puck hitch, an articulating slider hitch or Reese Sidewinder pin box is recommended for full 90-degree campsite backing.
FAQ Should I choose a Ram 2500 6.4L HEMI or Ram 3500 Cummins for a 12,000 lb fifth wheel?
Both solve the payload deficit: a Ram 2500 6.4L HEMI gas V8 carries ~3,120 lbs of payload under the same 10,000 lb GVWR, while a Ram 3500 SRW Cummins raises GVWR to 11,800–12,300 lbs (~4,080 lbs payload).
Related HD & 5th Wheel Audits & Calculators
Browse Heavy-Duty 2500/3500 5th Wheel & Gooseneck Pin Weight Guides matchups alongside Ram 2500 Heavy Duty: