2018 Ram 2500 Maintenance Schedule: Your Comprehensive Guide

The 2018 Ram 2500 is a formidable workhorse, prized by owners for its robust capabilities, impressive towing and hauling prowess, and the comfortable ride it delivers, especially for a heavy-duty truck. Whether you have the legendary 6.4L Hemi V8 gasoline engine or the mighty 6.7L Cummins Turbo Diesel, keeping up with a diligent maintenance schedule is key to ensuring your Ram 2500 continues to deliver reliable performance for years to come. This guide, written by an ASE-certified master technician, will outline factory service intervals, discuss common issues, severe-duty adjustments, typical service costs, and recall awareness.

Factory Service Intervals: Keeping Your Ram 2500 in Top Condition

Maintaining your 2018 Ram 2500 according to the manufacturer's recommended schedule is crucial for its longevity and performance. Below is a breakdown of essential service intervals. Please note that specific conditions and driving habits may necessitate more frequent service.

Service Item	6.4L HEMI (Gas) Interval	6.7L Cummins (Diesel) Interval	Typical Cost (Est.)
Engine Oil & Filter	Every 8,000-10,000 miles or 6-12 months	Every 15,000 miles or 12 months (or oil life monitor)	$80 - $150 (Gas), $150 - $250 (Diesel)
Tire Rotation	Every 8,000-10,000 miles	Every 15,000 miles	$30 - $60
Chassis Lubrication	Every 8,000-10,000 miles or 6-12 months	Every 15,000 miles or 12 months	$40 - $80
Cabin Air Filter	Every 15,000 miles or 12 months	Every 15,000 miles or 12 months	$40 - $80
Engine Air Filter	Every 30,000 miles or 24 months (inspect frequently)	Every 30,000 miles or 24 months (inspect frequently)	$50 - $100
Fuel Filter(s)	Not applicable (Gas)	Every 15,000 miles or 12 months (primary), 30,000 miles (secondary)	$100 - $200
Spark Plugs	Every 30,000 miles	Not applicable (Diesel)	$250 - $400
Brake Fluid	Every 30,000 miles or 24 months (inspect yearly)	Every 30,000 miles or 24 months (inspect yearly)	$100 - $150
Transfer Case Fluid	Every 60,000 miles or 48 months	Every 60,000 miles or 48 months	$150 - $250
Front/Rear Diff Fluid	Every 30,000 miles (heavy duty use), 60,000 miles (normal)	Every 30,000 miles (heavy duty use), 60,000 miles (normal)	$150 - $300 (per diff)
Coolant Flush	Every 100,000 miles or 60 months	Every 100,000 miles or 60 months	$150 - $300
Transmission Fluid	Every 60,000 miles (Gas), 120,000 miles (Diesel – Aisin, ZF) or 60,000 miles (Diesel – 68RFE)	Every 120,000 miles (Aisin/ZF), 60,000 miles (68RFE)	$300 - $600
Serpentine Belt	Inspect yearly, replace around 60,000-100,000 miles	Inspect yearly, replace around 60,000-100,000 miles	$150 - $250

Note: Costs are estimates and can vary significantly based on location, shop rates, and specific parts used.

Engine Oil and Filter

• 6.4L Hemi (Gasoline): The 6.4L Hemi typically uses synthetic blend or full synthetic oil. Ram recommends an oil change every 8,000-10,000 miles or 6-12 months, whichever comes first. Always check your owner's manual for the specific oil type (e.g., 0W-20 or 5W-20, depending on the exact engine variant and year) and viscosity recommendation.
• 6.7L Cummins (Diesel): The Cummins engine has a much longer oil change interval, often up to 15,000 miles or 12 months, thanks to its larger oil capacity and the robust design of the diesel engine. However, always defer to your vehicle's oil life monitoring system and your owner's manual. Use only API CJ-4 or newer rated diesel engine oil of the recommended viscosity.

Filters

• Fuel Filters (Diesel Only): The 6.7L Cummins has two fuel filters: a primary filter/water separator and a secondary filter. The primary filter typically needs replacement every 15,000 miles, while the secondary is recommended every 30,000 miles. Neglecting these can lead to significant fuel system problems.
• Engine Air Filter: Critical for both gasoline and diesel engines, inspect frequently, especially if driving in dusty conditions. Replace every 30,000 miles or as needed.
• Cabin Air Filter: Improves interior air quality. Replace annually or every 15,000 miles.

Spark Plugs (6.4L Hemi Only)

The 6.4L Hemi V8 in the 2018 Ram 2500 requires spark plug replacement more frequently than many modern engines, typically every 30,000 miles. This is not an overly complex job, but using the correct OEM-specified plugs is crucial for optimal performance and fuel efficiency.

Fluids

• Brake Fluid: Ram recommends inspecting your brake fluid annually and replacing it every 30,000 miles or 24 months. Brake fluid absorbs moisture over time, which can lead to reduced braking performance and damage to brake components.
• Transfer Case Fluid: Generally, the transfer case fluid should be changed every 60,000 miles or 48 months.
• Differential Fluids (Front & Rear): For normal use, differential fluid changes are recommended at 60,000 miles. However, this interval is significantly reduced to 30,000 miles for heavy-duty use (frequent towing, hauling, off-roading).
• Coolant: The factory-fill OAT (Organic Acid Technology) coolant has a long service life, typically 100,000 miles or 5 years. Use only the specified MOPAR OAT coolant to prevent compatibility issues.
• Transmission Fluid: This is where the 2018 Ram 2500 can differ based on the transmission.
  • 6.4L Hemi (68RFE Automatic): The 68RFE in the gasoline trucks has a recommended service interval of 60,000 miles for fluid and filter changes, especially with heavy use.
  • 6.7L Cummins (68RFE Automatic): For the diesel with the 68RFE, the interval is often extended to 60,000 miles, but many severe-duty owners opt for more frequent changes.
  • 6.7L Cummins (Aisin AS69RC Automatic): Trucks equipped with the Aisin transmission often have a longer recommended interval, around 120,000 miles, although severe duty will shorten this. Always consult your owner's manual for the precise interval for your specific transmission and application. Transmission services typically involve changing the fluid and filter(s).

Known Issues and Common Problems (2018 Ram 2500 - 4th Generation)

The 2018 Ram 2500 falls within the 4th generation (2010-2018). While generally robust, a few common issues and areas for attention exist:

• Death Wobble (Front Suspension Issues): This is perhaps the most widely known issue for Ram heavy-duty trucks of this generation. It's an aggressive, uncontrollable shaking of the front end, usually triggered by hitting a bump at highway speeds. Often, the culprits are worn track bar bushings, ball joints, steering linkage components, or steering damper issues. While not a recall, it's a very common complaint and requires inspection and replacement of worn steering and suspension components.
• Exhaust Gas Recirculation (EGR) System (6.7L Cummins): The 6.7L Cummins, like most modern diesels, utilizes an EGR system to reduce emissions. Over time, these systems can become clogged with soot, leading to reduced performance, diagnostic trouble codes (DTCs), and potentially costly repairs or replacements of the EGR valve, cooler, or related components. Regular maintenance and ensuring the engine reaches operating temperature can help mitigate this.
• Diesel Particulate Filter (DPF) Issues (6.7L Cummins): Another emissions component, the DPF can become clogged if the truck isn't driven frequently enough at speeds and durations that allow for proper regeneration cycles. Short trips and excessive idling can hasten DPF clogging, leading to power reduction and costly cleanings or replacements. Some owners experience sensor failures related to the DPF system.
• Uconnect System Glitches: While not mechanical, the Uconnect infotainment system can sometimes experience software glitches, freezing, or slow responses. Often, these can be resolved with software updates from the dealer or by performing a hard reset.
• Tailgate Latch/Power Lock Issues: Some owners have reported issues with the tailgate latch mechanisms or the power locking system for the tailgate, particularly in colder climates.
• Minor Electrical Gremlins: Like many modern vehicles, minor electrical issues such as intermittent sensor readings or accessory malfunctions can occasionally surface. Diagnostics with a capable scan tool are usually required.

Severe-Duty Adjustments

If your 2018 Ram 2500 regularly endures harsher conditions, you'll need to adjust your maintenance schedule accordingly. Severe-duty conditions include:

• Frequent towing or hauling heavy loads at or near GVWR/GCWR.
• Driving on dusty, muddy, or unpaved roads.
• Extended periods of idling or stop-and-go driving.
• Driving in extreme hot or cold temperatures.
• Off-road use.

For any of these conditions, consider performing the following services more frequently:

• Engine Oil & Filter: Shorten intervals by 25-50%.
• Air Filters (Engine & Cabin): Inspect and replace more often, especially in dusty conditions.
• Fuel Filters (Diesel): Replace more frequently.
• Differential and Transfer Case Fluids: Change fluids at 30,000-mile intervals.
• Transmission Fluid & Filter: Shorten intervals by 25-50%, especially if you tow or haul frequently.
• Chassis Lubrication: More frequent greasing of steering and suspension components.
• Brake Inspection: More frequent inspection of pads, rotors, and fluid condition due to increased wear.

Recall Awareness

While no pervasive, widely publicized recalls specifically targeting the 2018 Ram 2500 for critical common issues come to mind as of this writing (always check official sources), it is absolutely essential to stay informed about potential recalls that may affect your vehicle. Ram (FCA/Stellantis) consistently issues recalls for various components across their model lines. You can check for any open recalls on your specific truck by:

• Visiting the NHTSA recall website (www.nhtsa.gov/recalls) and entering your VIN.
• Visiting the Mopar (Ram) recall website and entering your VIN.
• Contacting a local Ram dealership service department with your VIN.

Address any open recalls promptly, as they are typically performed free of charge at a dealership and are critical for vehicle safety and proper function.

Find a Trusted Shop on Repairius

Keeping your 2018 Ram 2500 in peak condition requires the expertise of qualified technicians. Whether you need routine maintenance like an oil change or more complex diagnostics for a "death wobble" or DPF issue, Repairius.com can help you find a trusted, certified auto repair shop in your area. Our network of shops is committed to quality service and transparent pricing, ensuring your heavy-duty truck gets the care it deserves.