2020 Ram 3500 technical specifications

462TECHNICAL SPECIFICATIONS
(Continued)
CAUTION!
Mixing of engine coolant (antifreeze) other
than specified Organic Additive Technology
(OAT) engine coolant (antifreeze), may
result in engine damage and may decrease
corrosion protection. Organic Additive Tech -
nology (OAT) engine coolant is different and
should not be mixed with Hybrid Organic
Additive Technology (HOAT) engine coolant
(antifreeze) or any “globally compatible”
coolant (antifreeze). If a non-OAT engine
coolant (antifreeze) is introduced into the
cooling system in an emergency, the
cooling system will need to be drained,
flushed, and refilled with fresh OAT coolant
(conforming to MS.90032), by an autho -
rized dealer as soon as possible.Do not use water alone or alcohol-based
engine coolant (antifreeze) products. Do
not use additional rust inhibitors or antirust
products, as they may not be compatible
with the radiator engine coolant and may
plug the radiator.
This vehicle has not been designed for use
with propylene glycol-based engine coolant
(antifreeze). Use of propylene glycol-based
engine coolant (antifreeze) is not recom -
mended.
CAUTION! (Continued)

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TECHNICAL SPECIFICATIONS463
CHASSIS
Component Fluid, Lubricant, or Genuine Part
Automatic Transmission – Eight-Speed Automatic Use only Mopar ZF 8&9 Speed ATF Automatic Transmission Fluid, or
equivalent. Failure to use the correct fluid may affect the function or
performance of your transmission.
Transfer Case We recommend you use Mopar Transfer Case Lubricant for Borg Warner
44-44 and 44-45.
Front and Rear Axle We recommend you use SAE 75W-85 HD Ram GL-5 Synthetic Axle
Lubricant in 9.25 Front, 11.5 and 12.0 (Single Rear Wheel) Rear Axles.
Use Mopar GL-5 Synthetic Gear Lubricant SAE 75W-140 in 12.0 (Dual
Rear Wheel) Rear axles. Limited slip additive is required for limited slip
axles.
Brake Master Cylinder We recommend you use Mopar DOT 3.
Power Steering Reservoir We recommend you use Mopar Power Steering Fluid +4 or Mopar ATF+4
Automatic Transmission Fluid.
8

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464TECHNICAL SPECIFICATIONS
FLUIDS AND LUBRICANTS — DIESEL ENGINE
ENGINE
Component Fluid, Lubricant, or Genuine Part
Engine CoolantWe recommend you use Mopar Antifreeze/Coolant 10 Year/150,000 Mile (240,000 km) Formula OAT (Organic
Additive Technology).
Engine Oil In ambient temperatures above 0°F (-18°C), we recommend you use 10W-30 engine oil such as Mopar, Shell Rotella
and Shell Rimula that meets FCA Material Standard MS-10902 and the API CK-4 engine oil category is required.
Products meeting Cummins CES 20081 may also be used. The identification of these engine oils is typically located on
the back of the oil container.
In ambient temperatures below 0°F (-18°C), we recommend you use 5W-40
synthetic engine oil such as Mopar, Shell
Rotella and Shell Rimula that meets FCA Material Standard MS-10902 and the API CK-4 engine oil category is
required.
Engine Oil Filter We recommend you use Mopar Engine Oil Filters.
Fuel Filters We recommend you use Mopar Fuel Filter. Must meet 3 micron rating (engine mounted filter). Must meet 5 micron
rating (chassis mounted filter).
Using a fuel filter that does not meet the manufacturers filtration and water separating
requirements can severely impact fuel system life and reliability.
Crankcase Ventilation Filter We recommend you use Mopar CCV Filter.

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TECHNICAL SPECIFICATIONS465
Fuel SelectionUse good quality diesel fuel from a reputable supplier in your vehicle. Federal law requires that you must fuel this
vehicle with Ultra Low Sulfur Highway Diesel fuel (15 ppm Sulfur maximum) and prohibits the use of Low Sulfur
Highway Diesel fuel (500 ppm Sulfur maximum) to avoid damage to the emissions control system.
For most year-round service, No. 2 diesel fuel meeting ASTM specification D-975 Grade S15 will provide good
performance.
If climatized or diesel Number 1 ULSD fuel is not available, and you are operating below (20°F/-6°C), in sustained
arctic conditions, Mopar Premium Diesel Fuel Treatment (or equivalent) is recommended to avoid gelling.
This vehicle is fully compatible with biodiesel blends up to 5% biodiesel meeting ASTM specification D-975.
Pickup
models, and Chassis Cab models configured with optional B20 capability, are additionally compatible with 20%
biodiesel meeting ASTM specification D-7467.
Diesel Exhaust Fluid Mopar Diesel Exhaust Fluid (API Certified) (DEF) or equivalent that has been API Certified to the ISO 22241 standard.
Use of fluids not API Certified to ISO 22241 may result in system damage. You can receive assistance in locating DEF
in the United States by calling 866-RAM-INFO (866-726-4636). In Canada call 1–800–465–2001 (English) or
1–800–387–9983 (French).
Component
Fluid, Lubricant, or Genuine Part
8

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466TECHNICAL SPECIFICATIONS
CHASSIS
Component Fluid, Lubricant, or Genuine Part
Automatic Transmission – 6.7L Diesel with 68RFE Only use ATF+4 Automatic Transmission Fluid. Failure to use ATF+4 fluid
may affect the function or performance of your transmission. We
recommend Mopar ATF+4 fluid.
Automatic Transmission – 6.7L Diesel with AISIN (AS69RC) Only use Mopar ASRC Automatic Transmission Fluid or equivalent.Failure
to use the proper fluid may affect the function or performance of your
transmission
Transfer Case We recommend you use Mopar BW44–44 Transfer Case Fluid.
Front and Rear Axle Fluid (2500/3500) We recommend you use SAE 75W-85 HD Ram GL-5 Synthetic Axle
Lubricant in 9.25 Front, 11.5 and 12.0 (Single Rear Wheel) Rear Axles.
Use Mopar GL-5 Synthetic Gear Lubricant SAE 75W-140 in 12.0 (Dual
Rear Wheel) Rear axles. Limited slip additive is required for limited slip
axles.
Brake Master Cylinder We recommend you use Mopar DOT 3.

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