2018 Ram 3500: Factory Maintenance Schedule
Keep your 2018 Ram 3500 running strong with this complete 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.
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Quick Reference: 2018 Ram 3500 Maintenance
| Mileage | Service | Notes |
|---|---|---|
| 5,000 | Oil & Filter Change (Severe Duty) | Severe duty includes frequent towing, idling, or dusty conditions. |
| 7,500 | Oil & Filter Change | Standard interval for normal use. |
| 15,000 | Tire Rotation, Inspect Brakes | Check brake pads and rotors for wear. |
| 22,500 | Oil & Filter Change, Tire Rotation | |
| 30,000 | Replace Engine & Cabin Air Filters, Inspect Brakes | A good time for a thorough multi-point inspection. |
| 37,500 | Oil & Filter Change, Tire Rotation | |
| 45,000 | Oil & Filter Change, Tire Rotation, Inspect Brakes | |
| 52,500 | Oil & Filter Change, Tire Rotation | |
| 60,000 | Replace Fuel Filters, Inspect Brakes, Change Transfer Case Fluid (4x4) | |
| 67,500 | Oil & Filter Change, Tire Rotation | |
| 75,000 | Oil & Filter Change, Tire Rotation, Inspect Brakes | |
| 82,500 | Oil & Filter Change, Tire Rotation | |
| 90,000 | Replace Engine & Cabin Air Filters, Inspect Brakes | |
| 97,500 | Oil & Filter Change, Tire Rotation | |
| 100,000 | Spark Plug Replacement (6.4L HEMI), Coolant Flush | |
| 105,000 | Oil & Filter Change, Tire Rotation, Inspect Brakes | |
| 112,500 | Oil & Filter Change, Tire Rotation | |
| 120,000 | Transmission Fluid & Filter Service, Change Transfer Case Fluid (4x4) | |
| 127,500 | Oil & Filter Change, Tire Rotation | |
| 135,000 | Oil & Filter Change, Tire Rotation, Inspect Brakes | |
| 142,500 | Oil & Filter Change, Tire Rotation | |
| 150,000 | Accessory Drive Belt Inspection, Front & Rear Differential Service | Inspect for cracking or glazing. |
Severe-Duty Schedule
The 2018 Ram 3500's severe-duty schedule is for trucks that see heavy use. This includes frequent towing, extensive idling (common on work sites), driving in dusty or off-road conditions, or making many short trips in cold weather. The key differences are:
- Oil & Filter: Every 5,000 miles, or when the oil change indicator alerts, whichever comes first.
- Fuel Filters: May need to be replaced more frequently, as often as every 15,000 miles.
- Air Filters: Inspect and replace as needed, especially in dusty environments.
- Differential & Transfer Case: Service intervals may be halved, especially if towing heavy loads.
Known Issues by Mileage
- 30,000-60,000 Miles: Some owners report premature wear on front-end components like ball joints and tie rods, especially on lifted or leveled trucks. Water pump failure is another known issue in this range.
- 60,000-100,000 Miles: The 68RFE transmission may develop issues, often related to the torque converter or valve body. The exhaust gas recirculation (EGR) system can also become clogged, leading to performance problems.
- 100,000+ Miles: High-pressure fuel pump failure is a known, and costly, issue on the 6.7L Cummins. The diesel particulate filter (DPF) may also require service or replacement.
Estimated Cost Per Service
- Oil & Filter Change: $75 - $150
- Fuel Filter Replacement: $150 - $300
- Brake Fluid Flush: $100 - $200
- Coolant Flush: $150 - $300
- Transmission Service: $250 - $500
- Differential/Transfer Case Service: $150 - $300 per axle
- Spark Plug Replacement (6.4L HEMI): $200 - $400
What You Can DIY vs. Shop
- DIY: Oil and filter changes, engine and cabin air filter replacement, and tire rotations are all very DIY-friendly jobs on the Ram 3500.
- Shop: Transmission service, coolant flushes, and brake fluid flushes are best left to a professional, as they require special tools. Spark plug replacement on the 6.4L HEMI can be challenging due to access, and any work on the diesel fuel system is best left to an experienced technician.
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More specs for the 2018 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
2018 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.
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