2021 RAM PROMASTER transmission fluid

226SERVICING AND MAINTENANCE
(Continued)
BRAKE SYSTEM
In order to ensure brake system performance,
all brake system components should be
inspected periodically Úpage 212.
Fluid Level Check — Brake Master Cylinder
The fluid level of the master cylinder should be
checked when performing under the hood
service or immediately if the brake system
warning lamp indicates system failure. If
necessary, add fluid to bring level within the
designated marks on the side of the reservoir of
the brake master cylinder. Be sure to clean the
top of the master cylinder area before removing
cap. With disc brakes the fluid level can be
expected to fall as the brake linings wear. However, an unexpected drop in fluid level may
be caused by a leak and a system check should
be conducted Ú
page 268.
AUTOMATIC TRANSMISSION
Selection Of Lubricant

It is important to use the proper transmission
fluid to ensure optimum transmission
performance and life. Use only the
manufacturer’s specified transmission fluid

Ú
page 270. It is important to maintain the

WARNING!
Riding the brakes can lead to brake failure
and possibly a collision. Driving with your foot
resting or riding on the brake pedal can result
in abnormally high brake temperatures,
excessive lining wear, and possible brake
damage. You would not have your full braking
capacity in an emergency.
WARNING!
Use only FCA's recommended brake fluid
Ú page 268. Using the wrong type of brake
fluid can severely damage your brake
system and/or impair its performance. The
proper type of brake fluid for your vehicle is
also identified on the original factory
installed hydraulic master cylinder
reservoir.
To avoid contamination from foreign matter
or moisture, use only new brake fluid or
fluid that has been in a tightly closed
container. Keep the master cylinder reser -
voir cap secured at all times. Brake fluid in
a open container absorbs moisture from
the air resulting in a lower boiling point. This
may cause it to boil unexpectedly during
hard or prolonged braking, resulting in
sudden brake failure. This could result in a
collision.
Overfilling the brake fluid reservoir can
result in spilling brake fluid on hot engine
parts, causing the brake fluid to catch fire.
Brake fluid can also damage painted and
vinyl surfaces, care should be taken to
avoid its contact with these surfaces.
Do not allow petroleum based fluid to
contaminate the brake fluid. Brake seal
components could be damaged, causing
partial or complete brake failure. This could
result in a collision.
WARNING! (Continued)

21_VF_OM_EN_USC_t.book Page 226

SERVICING AND MAINTENANCE227

transmission fluid at the correct level using the
recommended fluid. No chemical flushes should
be used in any transmission; only the approved
lubricant should be used.

Special Additives
The manufacturer strongly recommends
against using any special additives in the
transmission. Automatic Transmission Fluid
(ATF) is an engineered product and its
performance may be impaired by supplemental
additives. Therefore, do not add any fluid
additives to the transmission. The only exception to this policy is the use of special dyes
for diagnosing fluid leaks in six-speed
transmissions. Avoid using transmission
sealers as they may adversely affect seals.
Fluid Level Check
The fluid level is preset at the factory and does
not require adjustment under normal operating
conditions. Routine fluid level checks are not
required, therefore the transmission filler tube
is capped and no dipstick is provided. Your
authorized dealer can check your transmission
fluid level using a special service dipstick. If you
notice fluid leakage or transmission
malfunction, visit your authorized dealer immediately to have the transmission fluid level
checked. Operating the vehicle with an
improper fluid level can cause severe
transmission damage.
Fluid And Filter Changes
For the proper maintenance intervals
Ú
page 212.
In addition, change the fluid and filter if the fluid
becomes contaminated (with water, etc.), or if
the transmission is disassembled for any
reason.
CAUTION!
Using a transmission fluid other than the
manufacturer’s recommended fluid may
cause deterioration in transmission shift
quality and/or torque converter shudder, and
will require more frequent fluid and filter
changes Ú page 270.
CAUTION!
Do not use chemical flushes in your
transmission as the chemicals can damage
your transmission components. Such damage
is not covered by the New Vehicle Limited
Warranty.
CAUTION!
If a transmission fluid leak occurs, visit an
authorized dealer immediately. Severe
transmission damage may occur. An
authorized dealer has the proper tools to
adjust the fluid level accurately.
8

21_VF_OM_EN_USC_t.book Page 227

270TECHNICAL SPECIFICATIONS
CHASSIS FLUIDS AND LUBRICANTS
Component Fluid, Lubricant, Or Genuine Part
Automatic Transmission Use Only 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.
Brake Master Cylinder We recommend you use Mopar DOT 4. DOT 4 brake fluid must be
changed every two years regardless of mileage.
Power Steering Reservoir Use Pentosin CHF 11S power steering fluid meeting FCA Material
Standard MS-11655.

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275
INDEX
A
Adding Engine Coolant (Antifreeze)............... 224Adding Washing Fluid.................................... 217Additives, Fuel............................................... 266Advance Phone Connectivity......................... 121Air Bag........................................................... 174Air Bag Operation...................................... 175Air Bag Warning Light................................ 173Enhanced Accident Response...................210Event Data Recorder (EDR)....................... 210If Deployment Occurs................................ 178Maintaining Your Air Bag System.............. 179Maintenance............................................. 179Side Air Bags............................................. 175Transporting Pets...................................... 187Air Bag Light..................................48, 173, 187Air Cleaner, Engine
(Engine Air Cleaner Filter).............................. 219Air Conditioner Maintenance......................... 219Air Conditioner Refrigerant.................. 219, 220Air Conditioner System.................................. 219Air Conditioning Filter............................. 35, 220Air Conditioning, Operating Tips................ 34, 35Air Filter......................................................... 219Air PressureTires.......................................................... 249
AlarmSecurity Alarm...................................... 13, 50Alarm SystemSecurity Alarm............................................. 13Alterations/ModificationsVehicle........................................................... 7Antifreeze (Engine Coolant)................. 223, 268Disposal................................................... 225Anti-Lock Brake System (ABS)...................... 149Anti-Lock Warning Light................................... 53Assist, Hill Start............................................. 153Audio Settings............................................... 107Audio Systems (Radio)..................................... 88Auto Down Power Windows............................. 39Auto Up Power Windows.................................. 39Automatic Door Locks...................................... 15Automatic Transmission.........................60, 227Adding Fluid.............................................. 227Fluid And Filter Change............................ 227Fluid Change............................................ 227Fluid Level Check............................ 226, 227Fluid Type........................................ 226, 270Special Additives...................................... 227AUX Cord.......................................................... 37Auxiliary Driving Systems.............................. 155
B
Battery................................................... 48, 217Charging System Light.................................48Keyless Key Fob Replacement....................11Belts, Seat.................................................... 187Blind Spot Monitoring................................... 155BluetoothConnecting To A Particular Mobile PhoneOr Audio Device After Pairing
................ 116Body Builders Guide........................................... 7Body Mechanism Lubrication........................ 221B-Pillar Location............................................ 245Brake Assist System..................................... 150Brake Control System, Electronic.................. 150Brake Fluid........................................... 226, 270Brake System....................................... 226, 264Anti-Lock (ABS)......................................... 149Fluid Check............................................... 226Master Cylinder........................................ 226Parking........................................................59Warning Light...............................................49Brake, Parking.................................................59Brake/Transmission Interlock..........................60Bulb Replacement........................................ 235Bulbs, Light.......................................... 188, 23511

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276 C
Camera, Rear
.................................................. 73Capacities, Fluid............................................ 268Caps, Filler Fuel............................................................. 75Oil (Engine)................................................ 215Power Steering............................................ 67Radiator (Coolant Pressure)...................... 224Car Washes................................................... 261Carbon Monoxide Warning............................ 189Cargo Area Cover............................................. 41Cargo Compartment........................................ 41Cargo Light...................................................... 28Certification Label........................................... 76Change Oil Indicator........................................ 45Changing A Flat Tire....................................... 190Chart, Tire Sizing............................................ 241Check Engine Light
(Malfunction Indicator Light)........................... 56Checking Your Vehicle For Safety.................. 186Checks, Safety............................................... 186Child Restraint............................................... 181Child RestraintsBooster Seats............................................ 184Child Seat Installation............................... 186Infant And Child Restraints....................... 183Older Children And Child Restraints..........183Clean Air Gasoline......................................... 266CleaningWheels...................................................... 255
Climate Control................................................ 31Manual........................................................ 31Rear............................................................. 34Cold Weather Operation.................................. 57Compact Spare Tire...................................... 253Contract, Service.......................................... 272Cooling Pressure Cap (Radiator Cap)............ 224Cooling System............................................. 223Adding Coolant (Antifreeze)...................... 224Coolant Level................................... 223, 225Cooling Capacity....................................... 268Disposal Of Used Coolant......................... 225Drain, Flush, And Refill............................. 223Inspection................................................. 225Points To Remember................................ 225Pressure Cap............................................ 224Radiator Cap............................................ 224Selection Of Coolant (Antifreeze)..... 223, 268Corrosion Protection..................................... 260Cruise Control (Speed Control)........................ 67Cruise Light...................................................... 54Cupholders................................................... 263Customer Assistance.................................... 271Customer Programmable Features.................. 89Cybersecurity................................................... 88
D
Dealer Service.............................................. 218Defroster, Windshield................................... 187Deleting A Phone.......................................... 117
Diagnostic System, Onboard............................55Dimmer Control Switch....................................29Dimmer SwitchHeadlight.....................................................26DipsticksAutomatic Transmission........................... 227Oil (Engine)............................................... 216Power Steering............................................67Disable Vehicle Towing................................. 209Disconnecting............................................... 117DisposalAntifreeze (Engine Coolant)...................... 225Disturb.......................................................... 120Door Ajar..........................................................49Door Ajar Light.................................................49Door Locks.......................................................14Automatic....................................................15Doors...............................................................14Driver’s Seat Back Tilt......................................15DrivingThrough Flowing, Rising, Or Shallow Standing Water
..........................86
E
Electric Brake Control System....................... 150Electric Remote Mirrors...................................24Electrical Power Outlets...................................37Electronic Speed Control (Cruise Control)........67Electronic Stability Control (ESC)................... 150Electronic Throttle Control Warning Light.........49

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277
Emergency, In Case Of Freeing Vehicle When Stuck
...................... 208Jacking...................................................... 190Jump Starting............................................ 203Emission Control System Maintenance........... 56Engine........................................................... 215Air Cleaner................................................. 219Block Heater............................................... 58Break-In Recommendations........................ 58Checking Oil Level..................................... 216Compartment............................................ 215Compartment Identification...................... 215Coolant (Antifreeze)......................... 223, 268Cooling...................................................... 223Exhaust Gas Caution................................. 189Fails To Start............................................... 57Flooded, Starting......................................... 57Fuel Requirements.......................... 265, 268Jump Starting............................................ 203Oil.................................................... 218, 268Oil Filler Cap.............................................. 215Oil Filter..................................................... 219Oil Selection.................................... 218, 268Oil Synthetic.............................................. 218Overheating............................................... 206Starting....................................................... 57Enhanced Accident Response Feature..........210Entry System, Illuminated................................ 30
Ethanol......................................................... 266Exhaust Gas Cautions................................... 189Exhaust System................................... 189, 221Exterior Lights.........................................26, 188
F
FiltersAir Cleaner
................................................ 219Air Conditioning..................................35, 220Engine Oil........................................ 219, 268Engine Oil Disposal................................... 218FlashersHazard Warning........................................ 190Turn Signals.......................................54, 188Flat Tire Changing................................ 240, 253Flat Tire Stowage................................. 240, 253Flooded Engine Starting................................... 57Fluid Capacities............................................ 268Fluid Leaks................................................... 189Fluid Level ChecksAutomatic Transmission........................... 227Brake........................................................ 226Cooling System......................................... 223Engine Oil................................................. 216Power Steering............................................ 67Fog Lights........................................................ 27Fold-Flat Seats................................................. 15Forward Collision Warning............................ 159
Four-Way Hazard Flasher.............................. 190Freeing A Stuck Vehicle................................. 208Fuel............................................................... 265Additives................................................... 266Clean Air................................................... 266Ethanol..................................................... 266Filler Cap (Gas Cap).....................................75Gasoline................................................... 265Materials Added....................................... 266Methanol.................................................. 266Octane Rating.................................. 265, 268Requirements.................................. 265, 268Tank Capacity........................................... 268Fuses............................................................ 228
G
Gas Cap (Fuel Filler Cap)...........................75, 76Gasoline, Clean Air........................................ 266Gasoline, Reformulated................................ 266Gear Ranges....................................................62Gear Selector Override.................................. 207Glass Cleaning.............................................. 263Gross Axle Weight Rating.......................... 76, 78Gross Vehicle Weight Rating.....................76, 78GuideBody Builders................................................. 7GVWR...............................................................7611

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281
Storing Your Vehicle
...................................... 260Supplemental Restraint System – Air Bag..... 174Sway Control, Trailer...................................... 154Synthetic Engine Oil....................................... 218
T
Telescoping Steering Column.......................... 15Tire And Loading Information Placard........... 245Tire Markings................................................. 240Tire Safety Information.................................. 240Tire Service Kit.................. 197, 198, 200, 202Tires................................... 188, 248, 253, 259Aging (Life Of Tires)................................... 251Air Pressure............................................... 248Chains....................................................... 257Changing................................................... 190Compact Spare......................................... 253General Information........................ 248, 253High Speed................................................ 249Inflation Pressure...................................... 249Jacking...................................................... 190Life Of Tires............................................... 251Load Capacity............................................ 245Pressure Monitoring System (TPMS)............................... 51, 161Quality Grading.......................................... 259Radial........................................................ 250Replacement............................................. 251Rotation.................................................... 258
Safety.............................................. 240, 248Sizes......................................................... 241Snow Tires................................................ 253Spare Tires...................................... 253, 255Spinning................................................... 250Trailer Towing.............................................. 82Tread Wear Indicators.............................. 251Wheel Nut Torque..................................... 264To Open Hood.................................................. 40Tongue Weight/Trailer Weight......................... 81Torque Converter Clutch.................................. 66Towing....................................................78, 209Disabled Vehicle....................................... 209Guide........................................................... 81Recreational................................................ 85Weight......................................................... 81Towing Behind A Motorhome........................... 85Traction............................................................ 86Traction Control............................................ 154Trailer Sway Control (TSC)............................. 154Trailer Towing.................................................. 78Hitches........................................................ 80Minimum Requirements.............................. 81Tips.............................................................. 84Trailer And Tongue Weight........................... 81Wiring.......................................................... 83Trailer Towing Guide........................................ 81Trailer Weight................................................... 81
TransmissionAutomatic.......................................... 60, 226Fluid.......................................................... 270Maintenance............................................ 226Transporting Pets.......................................... 187Tread Wear Indicators................................... 251Turn Signals.....................................................54
U
UconnectPhone Call Features
................................. 118Things You Should Know About YourUconnect Phone................................... 121Uconnect Phone..........................113, 114, 116Answer Or Ignore An Incoming Call — Call Currently In Progress..................... 120Answer Or Ignore An Incoming Call —No Call Currently In Progress................ 119Bluetooth Communication Link................ 124Call Continuation...................................... 121Call Controls............................................. 119Call Termination....................................... 121Cancel Command..................................... 114Connecting To A Particular Mobile Phone Or Audio Device After Pairing................ 116Help Command......................................... 114Join Calls.................................................. 12111

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