Overview
The 2025 RAM 3500 Heavy Duty is the peak of RAM's pickup lineup — and the most capable production truck in North America. The dually diesel variant's 37,100-lb tow and 7,680-lb payload set class records.
RAM holds the production truck record for maximum tow (37,100 lb) and maximum payload (7,680 lb) in the dually diesel configuration. No other brand matches these figures in the 2025 model year.
2026 Trims & Pricing
Available in Single Rear Wheel (SRW) and Dual Rear Wheel (dually) configurations.
Full Specs
| Spec | SRW Gas HEMI | SRW Cummins | Dually Cummins |
|---|---|---|---|
| Max 5th Wheel Tow | 15,710 lb | 25,250 lb | 37,100 lb |
| Max Payload | 5,680 lb | 4,640 lb | 7,680 lb |
| Engine Torque | 429 lb-ft | 1,075 lb-ft | 1,075 lb-ft |
| HP | 410 hp | 420 hp | 420 hp |
| MPG | 11/15 mpg | 15/20 mpg | 14/18 mpg |
37,100-lb Dually Capability
EPA highway rating measured at 55 mph. Real-world highway at 70 mph is typically 16–18 mpg. Towing near max capacity reduces highway fuel economy 35–45% — budget accordingly for trailer trips.
37,100 lb is 18.5 tons. A fully loaded 40-foot fifth-wheel RV weighs 20,000–30,000 lb. Agricultural equipment trailers commonly reach 35,000 lb. The RAM 3500 dually handles loads that even many semi-trucks avoid.
The RAM 3500 dually (dual rear wheels) with Cummins diesel reaches the maximum capability of any production truck: 37,100-lb 5th wheel towing and 7,680-lb payload. This is commercial territory — horse and livestock trailers, construction equipment, and large RVs.
Cummins Diesel Detail
The Cummins/AISIN combination is considered the most durable commercial-grade powertrain in a pickup truck. Fleet operators running 3500s for commercial purposes routinely achieve 250,000–400,000 miles with proper maintenance.
The 6.7L Cummins High-Output diesel produces 420 hp and 1,075 lb-ft of torque — identical to the RAM 2500. Paired with an AISIN 6-speed heavy-duty automatic, the 3500's drivetrain is calibrated for sustained heavy load work.
Daily Use Considerations
Commercial operators (construction, agriculture, horse), serious RVers with 30,000+ lb fifth wheels, and buyers who want absolute maximum capability. The 3500 is not a daily driver for most owners — it's a working tool.
The 3500 dually's 8-foot wide stance makes urban parking challenging — wider than many parking spots. Most 3500 buyers use it for commercial or rural purposes where width is not a constraint. Single Rear Wheel 3500 is more maneuverable with still-impressive capability.
Reliability
RAM 3500 reliability mirrors the 2500 — exceptional. The Cummins/AISIN drivetrain is the gold standard for heavy-duty longevity in production trucks.
| Area | Status | Notes |
|---|---|---|
| 6.4L HEMI V8 | Excellent | Proven HD HEMI; durable for commercial work |
| 6.7L Cummins HO | Excellent | Industry benchmark for diesel pickup reliability |
| AISIN 6-spd Auto | Excellent | Designed for sustained heavy-duty use; legendary durability |
| Dually Axle/Frame | Excellent | Commercial-grade construction; extremely durable |
| Electronics | Good | Uconnect 5 reliable; minor OTA updates needed |
| Overall | Excellent | One of the most reliable production vehicles ever made |
Consult Consumer Reports, J.D. Power, and NHTSA for the specific model year you are considering. Build year matters significantly.
Recalls
Verify all open recalls at nhtsa.gov/recalls using your 17-digit VIN. New recalls are issued regularly — check before any used vehicle purchase.
Recent Updates
Pros & Cons
7,680-lb payload — class record
Cummins diesel: industry benchmark for longevity
AISIN transmission: HD-rated and extremely durable
Limited trim delivers luxury in a maximum-capability truck
Fuel economy poor (11/15 mpg gas; 14/18 mpg diesel dually)
Starting at $51K; fully-loaded dually diesel Limited exceeds $90K
DEF requirement adds operating complexity
Overkill for most buyers — 2500 covers 95% of needs
FAQ
Accessories & Upgrades
Popular upgrades and accessories for the RAM 3500 Heavy Duty. Links are Amazon affiliate — we may earn a commission at no cost to you.
AmericanCarBrands.com participates in the Amazon Services LLC Associates Program. Prices and availability subject to change.
- RAM Trucks Media; NHTSA; Consumer Reports; EPA fueleconomy.gov
AmericanCarBrands.com is independent. Prices, specs, and recall data as of March 2026 — verify at manufacturer website. Brand names are trademarks of their owners. Affiliate links may generate commission.