2024 Ram 2500 Towing Capacity: HEMI vs Cummins — Full Spec & Payload Guide

The 2024 Ram 2500 towing capacity reaches a maximum of 19,990 lbs when equipped with the 6.7L Cummins Turbo Diesel in a Regular Cab configuration. With the 6.4L HEMI V8, the ceiling is 17,730 lbs — achieved with the 4.10 axle ratio and proper tow package.

But the number printed in the brochure is just the starting point. Real-world towing capacity on the Ram 2500 is determined by engine choice, axle ratio, cab and bed geometry, trim level, and hitch type. This guide breaks all of it down with verified spec data so you can configure the right truck for your actual load.

Quick Reference: 2024 Ram 2500 Towing Capacity at a Glance

2024 Ram 2500 towing capacity dashboard: engine comparison, trim-level towing, axle ratios, and payload trade-offs.

Engine Comparison: 6.4L HEMI V8 vs 6.7L Cummins Diesel

6.4L HEMI V8: Maximum Payload, Strong Towing

The 6.4L HEMI V8 is the standard engine across the entire 2024 Ram 2500 lineup. It produces 410 horsepower and 429 lb-ft of torque, uses Stellantis’s Multi-Displacement System (MDS) to deactivate four cylinders during light cruising, and — critically — weighs several hundred pounds less than the diesel. That weight advantage is what allows HEMI-equipped trucks to reach the Ram 2500’s absolute maximum payload rating of 4,000 lbs in a Regular Cab 4×2 configuration.

For axle ratio selection with the HEMI, see our full Dodge Ram gear ratio chart — it explains exactly how the 3.73 vs 4.10 differential impacts real-world towing and fuel economy across all Ram platforms.

The HEMI relies on horsepower to maintain momentum on grades. It operates higher in the RPM band under load compared to the diesel, and it responds better to the eight-speed ZF transmission’s downshift logic for sustained highway climbing. If your work profile involves heavy in-bed payloads — materials, equipment, livestock — the HEMI is the mathematically correct choice because of its lighter front-end weight.

6.7L Cummins Turbo Diesel: Built for Maximum Towing

The 6.7L Cummins Turbo Diesel inline-six generates 370 horsepower and 850 lb-ft of torque. That torque figure is the defining number — it delivers maximum pulling force at low RPMs, which is why the Cummins can pull 19,990 lbs without straining the drivetrain. The inline-six configuration is inherently balanced, eliminating the harmonic vibrations common in V-block engines and allowing a longer piston stroke that multiplies low-end rotational force.

The Cummins also integrates a variable geometry turbocharger (VGT) that spools rapidly at low RPMs while sustaining high boost at peak engine speeds. Combined with the 68RFE six-speed automatic transmission’s exhaust brake system, the Cummins provides both unmatched pulling power and strong engine braking on steep descents — a critical safety feature when managing a 20,000-lb rig on a mountain grade.

The trade-off: the Cummins’s massive cast-iron block is hundreds of pounds heavier than the HEMI. That weight cuts directly into the truck’s available payload, dropping the maximum to 3,140–3,150 lbs. For a deeper look at the long-term ownership picture with the diesel, our Ram 2500 gas vs diesel comparison covers maintenance costs, fuel economy, and real-world use cases in detail. For Cummins-specific maintenance, refer to the Ram 2500 maintenance schedule.

Transmission Architecture

ZF 8HP75-LCV (Gasoline)

The HEMI pairs with a ZF-sourced 8HP75-LCV eight-speed automatic. Eight ratios provide granular torque multiplication off the line and keep the naturally aspirated V8 within its narrow optimal powerband during sustained grade climbing. High-capacity transmission fluid coolers manage thermal load during heavy towing cycles.

Corporate 68RFE Six-Speed (Diesel)

The 68RFE features reinforced planetary gearsets and clutch packs rated to handle continuous 850 lb-ft of Cummins torque. Because peak diesel torque arrives so early in the RPM band, the 68RFE can hold higher gears under load that would require a gasoline engine to downshift. Its integrated exhaust brake system restricts exhaust flow to generate massive engine braking — saving friction brakes on long mountain descents. If you’re troubleshooting the Cummins exhaust or sensor systems, our 6.7 Cummins DPF pressure sensor guide is a useful reference for diesel-specific diagnostics.

Axle Ratios: The Single Biggest Lever on Towing Capacity

The rear axle ratio has a larger impact on towing capacity than any option except the engine itself. Stellantis offers two ratios for the 2024 Ram 2500 HEMI: 3.73 and 4.10.

The 4.10 ratio forces the driveshaft to rotate 4.10 times per wheel revolution, dramatically multiplying torque at the wheels. For operators on flat terrain with light or no loads, the 3.73 is the right choice. For anyone regularly pulling over 12,000 lbs — especially in hilly terrain — the 4.10 is essential. It keeps the eight-speed from hunting gears and prevents the torque converter from overheating on steep grades. See the Ram gear ratio chart for a side-by-side comparison across all Ram HD models and configurations.

Fuel economy with the 4.10 gear: fleet operators report approximately 15 MPG highway and 10–12 MPG city with the HEMI and 4.10 axle. For detailed Cummins economy figures by configuration, see our Ram 2500 Cummins MPG guide.

2024 Ram 2500 Towing Capacity by Cab & Bed Configuration

Within a fixed Gross Combined Weight Rating (GCWR), every pound of truck weight is a pound subtracted from trailer allowance. Larger cabs and longer beds add structural mass that directly reduces maximum tow capacity.

The Mega Cab Cummins is the most striking example of the GCWR trade-off: despite having the more powerful engine, it tows 4,120 lbs less than the lighter Regular Cab diesel — purely because the massive Mega Cab body consumes the GCWR budget. For Crew Cab dimension specifics, the Ram 2500 Crew Cab length guide covers full interior and exterior measurements.

Towing Capacity by Trim Level (Crew Cab 6’4″ Box, 4×4)

Luxury features add weight, and weight reduces towing capacity. Here is the direct impact across all seven 2024 Ram 2500 trims in the most popular Crew Cab 4×4 configuration. For a complete breakdown of what each trim includes, see our Ram 2500 trim levels guide.

Power Wagon vs Rebel: The Off-Road Towing Trade-Off

Power Wagon: Off-Road King, Not a Hauler

The Ram 2500 Power Wagon has a standard tow rating of just 9,360 lbs, maxing out near 10,590–10,600 lbs. On a truck with a 10,000-lb GVWR chassis, that number is jarring — and it is entirely intentional.

The Power Wagon uses the Ram Articulink front suspension system with an electronically disconnecting front sway bar and ultra-soft, high-travel coil springs designed for rock crawling. When a heavy trailer loads the hitch, those soft springs compress dramatically, causing the rear to squat and the front to lighten — destroying steering geometry and front-axle traction. Additionally, the factory Warn 12,000-lb winch bolts directly to the front frame rails, adding dense mass far forward of the front axle and consuming significant GCWR budget. For suspension upgrade options specific to the Ram 2500 platform, our best shocks for Ram 2500 guide covers Bilstein, Fox, and Rancho options that improve both ride and load management. The Ram 2500 off-road package guide also breaks down exactly what hardware comes with each off-road trim.

Ram 2500 Rebel: The Capable Compromise

The Rebel retains standard heavy-duty suspension geometry with stiffer load-bearing springs, upgrading only the damping via premium Bilstein gas-charged monotube shocks. It adds skid plates and 33-inch off-road tires — without the winch or the extreme suspension articulation of the Power Wagon.

The result: a Rebel with the HEMI can tow 16,870 lbs and carry a 3,140-lb payload. The Rebel is also available with the Cummins diesel (unlike the Power Wagon), yielding a maximum trailer weight of 14,890 lbs — lower than the gas version because the diesel’s weight eats into the GCWR.

Hitch Types: Conventional, Fifth-Wheel, and Gooseneck

The Ram 2500’s Class V receiver hitch has a structural tongue weight limit of 1,800 lbs. Since safe towing requires 10% of trailer weight on the hitch tongue, a 19,990-lb trailer would put 1,999 lbs on the receiver — 199 lbs over its structural limit. This is why Stellantis mandates an in-bed hitch for trailers over 18,000 lbs.

Fifth-wheel and gooseneck hitches place 15% of trailer weight directly over (or slightly forward of) the rear axle — not hanging behind the bumper. This prevents front-wheel lift, eliminates rear-steer pendulum sway, and loads the frame at its strongest point. The factory Fifth-Wheel/Gooseneck Tow Prep Group welds necessary crossmembers and mounting hardware into the frame during initial assembly.

For trailer brake controller wiring — which is required for any trailer with electric brakes at these weights — our brake controller wiring diagram guide for Dodge Ram covers factory and aftermarket installation step-by-step.

Payload and Tongue Weight: The Math Most Owners Get Wrong

Payload capacity and towing capacity are mutually exclusive — a truck cannot simultaneously haul maximum payload and pull maximum trailer weight. The GCWR is the absolute ceiling for the combined weight of the truck, trailer, passengers, cargo, and fluids.

Practical example for a Crew Cab 4×4 Cummins (payload: ~3,140 lbs):

• Family of 4 in cab: −600 lbs → 2,540 lbs remaining payload
• Tools and gear in bed: −400 lbs → 2,140 lbs remaining payload
• Tongue weight from 14,000-lb fifth-wheel (15%): −2,100 lbs → 40 lbs remaining
• Result: Mathematically at the GVWR limit before a single bag of feed goes in the bed

This is why fleet managers and frequent towers must calculate payload first, not towing capacity. The tongue weight of the trailer counts against your payload — not against the tow rating.

Suspension Systems: Coil Spring vs Air Suspension

Standard Five-Link Coil-Spring Rear Suspension

The Ram 2500’s five-link coil-spring rear suspension controls the solid rear axle through five articulating links (track bars and trailing arms), while progressive-rate steel coils handle vertical load. This geometry mitigates axle wrap — the destructive twisting of the axle housing under 850 lb-ft of diesel torque during hard acceleration. Compared to traditional leaf springs, the coil setup provides a dramatically more refined unladen ride without sacrificing the lateral stiffness needed to control high-profile trailers in crosswinds. For shock absorber upgrades that complement this suspension architecture, see the best shocks for Ram 2500 guide.

Auto-Level Rear Air Suspension (Available)

The available air suspension adds pneumatic bladders to the rear suspension. When a trailer loads the hitch, height sensors detect the squat and an onboard compressor automatically inflates the bags to restore a level stance. Leveling is a safety function: a squatted rear unweights the front axle, reduces steering authority, increases stopping distance, and aims headlights skyward. The system also includes a Bed Lowering Mode that rapidly deflates the bags, dropping the rear to easily slide under a fifth-wheel pin box or trailer tongue.

SAE J2807 Testing: What the Certification Actually Means

Every tow rating on the 2024 Ram 2500 is certified under SAE J2807 standards, which replaced the era of manufacturer-self-reported, cherry-picked numbers. The most demanding test is the Davis Dam grade climb — an 11.4-mile stretch of Arizona highway at a 5% grade, tested at 100°F ambient temperature with the A/C running on maximum. The truck must sustain minimum speed while towing maximum weight without engine coolant, oil, or transmission fluid reaching thermal failure thresholds.

J2807 also mandates standardized weight assumptions built into every published tow rating:

• 300 lbs assumed for driver and passenger
• 100 lbs for factory options and aftermarket accessories
• 75 lbs deducted for a conventional receiver hitch
• 250 lbs deducted for a fifth-wheel hitch assembly in the bed

Advanced Towing Technology on the 2024 Ram 2500

• Tow-Mode Digital Rearview Mirror: Replaces standard reflective mirror with an HD LCD screen fed by a wired camera on the rear of the trailer — the enclosed trailer disappears from the driver’s view, replaced with a live HD feed.
• Trailer Reverse Steering Control: The driver uses a rotary dial on the center console to indicate the trailer’s intended direction. The truck’s steering modules calculate and execute the counter-steering geometry autonomously — no hands on the wheel.
• 360-Degree Surround Camera with Trailer Guidance: Stitches multi-camera feeds into a top-down digital view of the truck and trailer environment, with dynamic vector lines predicting trailer path on the 12-inch Uconnect screen.
• Cargo-View Camera (CHMSL): High-mounted rear-facing camera allows monitoring of bed cargo and precise gooseneck ball alignment without a spotter.
• Blind-Spot with Tag-Trailer Detection: Operator inputs trailer length into the system; radar sensors extend their monitoring zone to cover the full combined truck-and-trailer length during lane changes.

Frequently Asked Questions

Why does the Cummins diesel lower payload capacity on the Ram 2500?

The 6.7L Cummins block is cast iron, built to withstand extreme compression ratios — and it weighs hundreds of pounds more than the aluminum-headed HEMI V8. Because the GVWR is a fixed structural ceiling, the extra diesel engine mass is deducted directly from the remaining payload allowance. The diesel pulls more weight on a trailer but carries less weight in the bed.

Why does the Power Wagon tow so much less than other Ram 2500 trims?

The Power Wagon uses ultra-soft coil springs and a disconnecting front sway bar designed for rock-crawling articulation. Those soft springs compress severely under trailer tongue weight, causing dangerous rear squat and front-wheel lift. The mandatory factory Warn winch adds heavy mass far forward on the frame, further consuming the GCWR. It’s a purpose-built off-road tool, not a tower.

Do I need a weight distribution hitch on the Ram 2500?

For conventional bumper-pull trailers over 10,000 lbs, a weight-distributing hitch (WDH) is strongly recommended. The Class V receiver is limited to 1,800 lbs tongue weight. A WDH uses spring bars to lever that load forward onto the truck’s front steering axle and backward onto the trailer axles — restoring steering authority and ensuring the front brake calipers operate at full efficiency. Our brake controller wiring guide covers the full hitch-to-brake-controller integration for Ram HD trucks.

What is the break-in period for towing with a new 2024 Ram 2500?

Stellantis and Cummins guidelines specify: no towing for the first 500 miles of operation, allowing rear differential ring and pinion gears to lap together under normal operating heat. From 500–1,000 miles, limit towing speed to 50 MPH to allow the drivetrain to fully heat-cycle before subjecting it to maximum loads.

Is the 2024 Ram 2500 the highest-towing half-ton truck available?

No — the Ram 2500 is a three-quarter-ton (Class 2b) heavy-duty truck, not a half-ton. For a comparison with the Ram 1500’s half-ton towing capabilities (up to 11,610 lbs internally and 14,000 lbs with the Ramcharger), see our Dodge Ram 1500 towing capacity guide. For the even heavier one-ton Ram 3500 platform, the Ram 3500 towing capacity chart provides complete spec data. Historical Ram 2500 numbers are also available in our 2006 Ram 2500 towing capacity archive.

Key Takeaways for Buyers and Fleet Managers

1. Maximum towing = Cummins diesel + Regular Cab + 4×2: The 19,990-lb ceiling is only achievable in this specific configuration. Every cab upgrade and drivetrain addition reduces it.
2. Maximum payload = HEMI V8 + Regular Cab + 4×2: The lighter gasoline engine allows 4,000 lbs of payload — the diesel’s weight penalty cuts this to ~3,150 lbs.
3. The 4.10 axle ratio is not optional for serious towing with the HEMI: It adds 2,200 lbs of capacity versus the 3.73 — the equivalent of a small car’s worth of trailer weight.
4. Payload limits real-world towing before the tow rating does: Calculate tongue weight + passengers + cargo against your specific truck’s payload. Most Crew Cab 4×4 owners hit the GVWR ceiling well before the tow rating becomes the constraint.
5. The Power Wagon is a purpose-built trail machine: If towing is a regular priority, the Rebel is the correct off-road-capable choice — it tows nearly 7,000 lbs more than the Power Wagon.
6. Fifth-wheel or gooseneck hitch is required above 18,000 lbs: The Class V receiver’s 1,800-lb tongue weight limit physically prevents safe conventional towing at the diesel’s maximum rating.