2020 Ram 3500 Factory Maintenance Schedule
AI-generated reference. Always verify torque values, fluid capacities, intervals, and procedures against the manufacturer's service manual or OEM repair information before performing work. Repairius is not liable for damage from acting on this content without verification.
Working on this 2020 Ram 3500? Run just this one job through Repairius.
No big switch. Write the estimate, text it for approval, and get paid on your phone. Keep everything else the way it is.
14-day free trial · credit card required · cancel anytime
Quick Reference
| Mileage | Service | Notes |
|---|---|---|
| 5,000 | Oil & Filter Change (Severe) | Recommended for vehicles under severe duty. |
| 10,000 | Oil & Filter Change, Tire Rotation | Normal service interval. |
| 15,000 | Cabin Air Filter | Some models may have a 15k interval. Check owner's manual. |
| 20,000 | Oil & Filter Change, Tire Rotation | |
| 30,000 | Oil & Filter Change, Tire Rotation, Fuel Filter, Engine Air Filter | Fuel filter replacement is critical on diesel models. |
| 60,000 | Oil & Filter Change, Tire Rotation, Brake Fluid Flush, Transmission Fluid & Filter | Transmission service may vary based on use. Defer to owner's manual. |
| 100,000 | Oil & Filter Change, Tire Rotation, Spark Plugs (Gas), Coolant Flush, Accessory Belt | Spark plug interval for gas engines only. |
| 120,000 | Oil & Filter Change, Tire Rotation, Transmission Fluid & Filter, Differential & Transfer Case Service | |
| 150,000 | Oil & Filter Change, Tire Rotation, Coolant Flush, Timing Belt/Chain Inspection | Inspect timing chain for wear. Non-interference engines typically have a longer interval. |
Severe-duty schedule
For 2020 Ram 3500 trucks that are used for towing, operate in dusty environments, are driven for short trips, or in cold climates, the factory recommends a more frequent maintenance schedule. This includes:
- Oil & Filter Change: Every 5,000 miles or 6 months, whichever comes first.
- Tire Rotation: Every 5,000 miles.
- Fuel Filter: Every 15,000 miles on diesel models.
- Transmission Fluid & Filter: Every 30,000 miles.
- Differential & Transfer Case Service: Every 30,000 miles.
Known issues by mileage
- 30,000 miles: Some owners have reported premature wear on the front brake pads and rotors. This is more common on trucks that are used for towing.
- 60,000 miles: The factory transmission fluid and filter change is due at this interval. However, some owners have reported transmission issues even with regular service. Be sure to use only the factory-recommended fluid and filter.
- 100,000 miles: The spark plugs are due for replacement on gas models. On diesel models, this is a good time to have the fuel injectors cleaned and inspected.
- 150,000 miles: The timing chain should be inspected for wear. While the 6.7L Cummins is known for its durability, the timing chain is a wear item and should be replaced as needed.
Estimated cost per service
- Oil & Filter Change: $50 - $100
- Tire Rotation: $20 - $30
- Cabin Air Filter: $30 - $50
- Engine Air Filter: $40 - $60
- Fuel Filter: $100 - $150 (diesel)
- Brake Fluid Flush: $100 - $150
- Transmission Fluid & Filter: $250 - $400
- Spark Plugs: $200 - $300 (gas)
- Coolant Flush: $150 - $200
- Accessory Belt: $100 - $150
- Differential & Transfer Case Service: $150 - $250
What you can DIY vs shop
- DIY: Oil and filter change, tire rotation, cabin and engine air filter replacement.
- Shop: Fuel filter, brake fluid flush, transmission fluid and filter, spark plugs, coolant flush, accessory belt, differential and transfer case service, timing belt/chain inspection.
Book service on Repairius.
More specs for the 2020 Ram 3500
Oil Capacity & Filter
Capacity, weight, filter PN, drain plug torque, change interval.
Fluid Type Specs
Engine oil, coolant, ATF, diff, brake, PS, DEF — with OEM spec numbers.
Coolant Capacity & Type
Total system capacity, OEM coolant spec, flush interval, bleed tips.
Transmission Fluid & Service
Trans model, fluid spec, capacity, filter PN, service interval.
Torque Specifications
Lug nuts, drain plug, caliper, axle nut, plug, key fasteners.
Brake Pad & Rotor Specs
Pad PNs, rotor size, min thickness, caliper torque.
Tire Size & Pressure
OEM size, cold psi, bolt pattern, wheel size, TPMS.
Battery Size & Group
Group size, CCA, AGM/flooded, dimensions, reset note.
A/C Refrigerant & Oil
R-134a or R-1234yf, charge oz, PAG oil spec.
Bulb Sizes (Headlight, Tail, Fog)
Headlight, fog, tail, turn, reverse, interior.
Towing Capacity & Payload
Max tow, payload, GVWR/GCWR, hitch class by trim.
Fuse Box Diagram & Amperage
Fuse box locations, layout, amps, and what each fuse controls.
Serpentine Belt Routing & Length
Belt routing, length, rib count, OEM + aftermarket PNs.
Wheel Alignment Specifications
Camber, caster, toe ranges (front & rear), adjustability notes.
Paint Color Codes
All factory colors with paint codes, sticker location, touch-up tips.
Wiper Blade Sizes
Driver/passenger/rear blade size, attachment, OEM + cross-refs.
Spark Plug Type & Gap
Plug PN, gap, torque, interval by engine.
Transmission & Axle Gear Ratios
Trans gear ratios, axle ratios, RPO codes, tow vs MPG impact.
Key Fob Programming
DIY programming steps, FCC ID, fob PN, battery, transponder.
Same spec — other model years
Maintenance & repair guides
2020 Ram 3500 Maintenance Schedule →
Available maintenance guidance; confirm the manufacturer schedule.
Repair planning references →
Plan the scope of work; detailed procedures need configuration-matched evidence.
Browse by make
Running an auto or diesel repair shop?
Compare Repairius to the shop software you're paying for
$99.99/month (first location included), unlimited users, 14-day free trial.