2014 Ram 3500 — Complete Fluid Type Specifications

Quick reference

Fluid	Type/Spec	Capacity
Engine oil (6.7L Cummins diesel)	API CJ-4 or CK-4; Cummins CES 20081/20086; typical viscosities 15W-40 or 5W-40 synthetic	~12.0 qt (11.4 L) w/filter
Engine oil (5.7L HEMI gas)	SAE 5W-20 meeting Chrysler MS-6395	~7.0 qt (6.6 L) w/filter (verify per engine)
Engine oil (6.4L HEMI gas)	SAE 0W-40 meeting Chrysler MS-12633	~7.0 qt (6.6 L) w/filter (verify per engine)
Engine coolant	Mopar 10 Year/150,000 Mile OAT; spec MS-12106; typically purple/orange	Diesel: ~21–25 qt; Gas: ~14–16 qt (verify by engine)
Automatic transmission (68RFE)	Mopar ATF+4; spec MS-9602	Pan drop ~7–8 qt; dry fill ~17 qt (verify)
Automatic transmission (Aisin AS69RC)	Mopar fluid specifically for AS69RC (do NOT use ATF+4); refer to owner’s manual/OEM	Service fill ~7–12 qt; dry fill ~19–22 qt (verify)
Manual transmission (G56, if equipped)	Mopar Manual Transmission Fluid SAE 50; spec MS-9224 (supersedes earlier ATF+4 guidance)	~6–7 qt (verify)
Transfer case (NV271D/NV273D, 4x4)	Mopar ATF+4; spec MS-9602	~2.0–2.2 qt
Front differential (AAM 9.25/others, 4x4)	75W-90 GL-5 (75W-140 for heavy towing); use LS additive if Trac-Lok	~2.0–2.7 qt (verify by axle)
Rear differential (AAM 11.5/11.8)	75W-90 GL-5 (75W-140 for heavy towing); LS additive if Trac-Lok	~3.5–4.5 qt (verify by axle)
Brake fluid	DOT 3 (Mopar DOT 3; check cap); spec typically MS-4574	As needed; ~1–2 qt for a full flush
Power steering/hydroboost	Often Mopar ATF+4; spec MS-9602 (check reservoir label for your truck)	~1–2 qt for service
Washer fluid	Conventional washer solvent appropriate to climate	~4–6 qt (varies by body style)
Diesel Exhaust Fluid (DEF, diesel only)	ISO 22241-compliant DEF (32.5% urea)	~5–8 gal depending on tank size (verify)

Engine oil

• 6.7L Cummins (2014): Use heavy‑duty engine oil meeting API CJ-4 or the newer CK-4 category. Cummins approvals CES 20081 (CJ‑4) or CES 20086 (CK‑4) are acceptable. Viscosity: 15W‑40 for most ambient temps; 5W‑40 full synthetic improves cold starts and high‑load protection.
• Gas engines: 5.7L HEMI typically specifies 5W‑20 meeting Chrysler MS‑6395. The 6.4L HEMI generally specifies 0W‑40 meeting Chrysler MS‑12633. Confirm your specific engine’s oil grade on the oil fill cap/owner’s manual.
• Capacities: Cummins ~12.0 qt with filter. Gas HEMI V8s are typically ~7.0 qt; verify by engine code.
• Intervals: Follow the on‑board oil life monitor or owner’s manual severe‑/normal‑service tables. Diesel owners running heavy towing/idle time should favor shorter intervals and periodic used‑oil analysis.
• Pitfalls: Do not use passenger‑car oils that lack diesel additives in the Cummins. For HEMI MDS function and cam/lifter health, ensure the oil meets the stated Mopar spec.

Engine coolant

• Type: Mopar OAT (Organic Acid Technology) 10 Year/150,000 Mile coolant; spec MS‑12106. Factory fill is typically purple; it may appear orange depending on lighting.
• Capacity: Diesel ~21–25 qt; Gas ~14–16 qt (varies by engine/cooling package). Always verify by VIN/engine.
• Intervals: 10 years/150,000 miles initial service is typical for OAT; inspect level and freeze protection annually.
• Pitfalls: Do not mix OAT with older HOAT (MS‑9769) or “universal” coolants. Mixing can shorten life and cause deposits. If contamination is suspected, perform a complete distilled‑water flush and refill with MS‑12106 OAT premix.

Transmission fluid

• 68RFE automatic: Requires Mopar ATF+4 (MS‑9602). Pan service is ~7–8 qt; a dry rebuild is ~17 qt. Replace the sump filters when servicing.
• Aisin AS69RC automatic (high‑output Cummins): This unit requires a dedicated fluid formulated for AS69RC. Use the exact Mopar/Aisin‑approved fluid listed in the owner’s manual; ATF+4 is not correct. Expect ~7–12 qt on a service fill and ~19–22 qt dry. Always verify by transmission tag/VIN.
• G56 6‑speed manual: FCA superseded earlier ATF guidance to a dedicated SAE 50 manual transmission fluid meeting MS‑9224. Fill is roughly 6–7 qt; verify by service info. Do not mix fluid types.
• Intervals: Severe service (towing, hot climates) benefits from more frequent changes. Follow OEM intervals; check for software/TSB updates that may alter recommendations.
• Pitfalls: Avoid “universal ATF.” The Aisin AS69RC especially is fluid‑sensitive—using the wrong ATF can cause shift issues and clutch damage.

Transfer case (4x4)

• Models NV271D (manual shift) and NV273D (electric shift) use Mopar ATF+4 (MS‑9602). Capacity ~2.0–2.2 qt.
• Service tip: Engage 4WD periodically to circulate fluid. Inspect for vent and output‑seal leaks after off‑road or towing use.

Front differential (4x4)

• Axles: Commonly AAM 9.25" or similar, depending on GVWR.
• Fluid: API GL‑5 gear oil; 75W‑90 for normal duty, 75W‑140 for heavy towing/high heat. If equipped with Trac‑Lok/limited‑slip, add Mopar friction modifier unless your gear oil is LS‑rated.
• Capacity: ~2.0–2.7 qt depending on axle build and cover shape—verify by axle tag.
• Interval/pitfalls: Shorten intervals for water crossings or heavy towing. Overfilling can aerate; underfilling can overheat—fill to the bottom of the fill plug per OEM.

Rear differential

• Axles: AAM 11.5" or AAM 11.8" (HO/DRW packages).
• Fluid: API GL‑5; 75W‑90 standard, 75W‑140 for severe service/towing. Add limited‑slip friction modifier if Trac‑Lok is fitted and the oil isn’t LS‑rated.
• Capacity: ~3.5–4.5 qt depending on axle and cover (verify by axle code).
• Notes: Many towing packages specify 75W‑140 from the factory—confirm on the axle tag or owner’s manual.

Brake fluid

• Type: DOT 3 (Mopar DOT 3; commonly MS‑4574—check cap/owner’s manual). DOT 4 is not a required upgrade unless specified.
• Capacity: System varies; plan on ~1–2 qt for a complete flush.
• Tips: Keep fluid sealed and clean—moisture reduces boiling point. Use the ABS bleed procedure when applicable.

Power steering/hydroboost

• Type: Many 2014 Ram 3500 trucks specify Mopar ATF+4 (MS‑9602) in the power steering/hydroboost system. Always confirm on the reservoir cap/under‑hood label; some applications may specify a dedicated Mopar power steering fluid.
• Capacity: ~1–2 qt for a drain/refill or component replacement.
• Notes: Do not mix ATF+4 with non‑approved PS fluids. After service, bleed by cycling steering lock‑to‑lock with wheels off the ground.

Washer fluid

• Type: Standard windshield washer solvent appropriate to your climate (add methanol‑based de‑icer where needed).
• Capacity: ~4–6 qt, varying with cab/engine bay packaging.

Diesel Exhaust Fluid (DEF) — diesel only

• Spec: ISO 22241‑compliant DEF (32.5% urea/67.5% deionized water). Use sealed, fresh product.
• Capacity: Typically ~5–8 gallons depending on tank option (verify by VIN/build).
• Notes: DEF consumption varies with load and ambient temperature (often 2–3% of diesel fuel use). Store DEF out of heat; it freezes around 12°F (‑11°C) but is not harmed by freeze/thaw when sealed. Keep the fill neck clean—contamination can damage the SCR system.

Always verify your exact capacities and specifications in the owner’s manual or OEM service information by VIN, especially where multiple engines, transmissions, or axles were offered in 2014.

Find a trusted shop on Repairius.