2018 Ram 4500 Chassis Cab automatic transmission fluid

Mileage or time passed (which-ever comes first)
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
100,000
110,000
120,000
130,000
140,000
150,000
Or Years: 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Or Kilometers:
32,000
48,000
64,000
80,000
96,000
112,000
128,000
144,000
160,000
176,000
192,000
208,000
224,000
240,000
Change the automatic transmis-
sion fluid (AS66RC Transmission
Only). XX X
Change the automatic transmis-
sion fluid and sump filter (AS66RC
Transmission Only). XX
Change the automatic transmis-
sion fluid and filter(s) (66RFE
Transmission Only), if using your
vehicle for police, taxi, fleet, or fre-
quent trailer towing. XX
Change the automatic transmis-
sion fluid and filter(s) (66RFE
transmission). X
Inspect the transfer case fluid,
change for any of the following:
police, taxi, fleet, or frequent trailer
towing. XX X X X
Change the transfer case fluid. X
362 SERVICING AND MAINTENANCE

WARNING!(Continued)
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 mois-
ture, use only new brake fluid or fluid that has been
in a tightly closed container. Keep the master cylin-
der reservoir 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 brak-
ing, 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.
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. Refer
to “Fluids And Lubricants” in “Technical Specifications”. It
is important to maintain the 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.
CAUTION!
Using a transmission fluid other than the manufactur-
er ’s recommended fluid may cause deterioration in
transmission shift quality and/or torque converter
shudder, and will require more frequent fluid and
filter changes. Refer to “Fluids And Lubricants” in
“Technical Specifications” for fluid specifications.
8
SERVICING AND MAINTENANCE 389

Special Additives
The manufacturer strongly recommends against using any
special additives in the transmission. Automatic Transmis-
sion Fluid (ATF) is an engineered product and its perfor-
mance may be impaired by supplemental additives. There-
fore, 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. Avoid using transmission seal-
ers as they may adversely affect seals.
CAUTION!
Do not use chemical flushes in your transmission as
the chemicals can damage your transmission compo-
nents. Such damage is not covered by the New Vehicle
Limited Warranty.
Fluid Level Check
Check the fluid level when the engine is fully warmed up
and the transmission fluid is at normal operating tempera-
ture. Driving with an improper fluid level will greatly
reduce the life of the transmission and of the fluid. Check
the fluid level whenever the vehicle is serviced.
Fluid Level Check — Procedure
It is best to check the fluid level when the transmission is
at normal operating temperature (170-180°F / 77-82°C for
66RFE transmission, or 158–176°F / 70–80°C for AS66RC
transmission). This normally occurs after at least 15 miles
(25 km) of driving. At normal operating temperature the
fluid cannot be held comfortably between the fingertips.
You can read the transmission sump temperature in the
instrument cluster display (refer toInstrument Cluster
Display” in “Getting To Know Your Instrument Panel” for
further information).
Use the following procedure to check the transmission
fluid level properly:
1. Monitor the transmission temperature using the instru- ment cluster display, and operate the vehicle as required
to reach the normal operating temperature. If the trans-
mission is not functioning properly, or the vehicle
cannot be driven, see the NOTE and CAUTION below
about checking the fluid level at colder temperatures.
2. Park the vehicle on level ground.
3. Run the engine at normal idle speed for at least 60 seconds, and leave the engine running for the rest of this
procedure.
390 SERVICING AND MAINTENANCE

Chassis
ComponentFluid, Lubricant, or Genuine Part
Automatic Transmission (6.4L Engine with 66RFE
Transmission) (For Diesel Engine See Diesel Supple-
ment) 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.
Automatic Transmission (6.4L Engine with AS66RC
Transmission) Use only 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 (4500/5500) We recommend you use GL-5 SAE 75W-90 Synthetic (MS-9763).
Limited slip additive is not required for Limited-Slip Rear
Axles.
Brake Master Cylinder We recommend you use Mopar DOT 3 and SAE J1703. If DOT
3 brake fluid is not available, then DOT 4 is acceptable.
Power Steering Reservoir We recommend you use Mopar Power Steering Fluid +4,
Mopar ATF+4 Automatic Transmission Fluid.
9
TECHNICAL SPECIFICATIONS 437

Adding Engine Coolant (Antifreeze).............385
Adding Fuel ............................. .289
Additives, Fuel ........................ .290, 430
Adjust Down .............................. .46, 48
Forward ............................ .46, 48
Rearward ........................... .46, 48
Up ................................ .46, 48
Adjustable Pedals ...........................59
Air Bag Air Bag Operation ....................... .200
Air Bag Warning Light .....................197
Enhanced Accident Response .............206, 355
Event Data Recorder (EDR) .................355
If A Deployment Occurs ....................205
Knee Impact Bolsters ..................... .201
Maintaining Your Air Bag System .............207
Transporting Pets ....................... .233
Air Bag Light ...................... .150, 197, 234
Air Bag Maintenance ....................... .207
Air Cleaner, Engine (Engine Air Cleaner Filter) ......368
Air Conditioner Maintenance ..................371
Air Conditioning ............................82
Air Conditioning Filter ....................97, 372
Air Conditioning, Operating Tips ................97Air Conditioning Refrigerant
...............371, 372
Air Conditioning System ...................96, 371
Air Filter ............................... .368
Air Pressure, Tires ......................... .405
Alarm, Panic ...............................22
Alarm (Security Alarm) ....................33, 151
Alarm System (Security Alarm) .................33
Alterations/Modifications, Vehicle ................7
Antifreeze (Engine Coolant) ...................385
Capacities ............................. .434
Disposal .............................. .387
Anti-Lock Brake System (ABS) .................164
Anti-Lock Warning Light .....................156
Ashtray ................................ .127
Assist,

Hill Start .......................... .166
Audio Systems (Radio) ...................... .441
Auto Down Power Windows ...................99
Automatic Door Locks ........................40
Automatic Headlights ........................72
Automatic High Beams .......................71
Automatic Temperature Control (ATC) ............96
Automatic Transmission Adding Fluid .......................... .391
Fluid And Filter Changes ...................392
Fluid Level Check .....................389, 390
512 INDEX

Exterior Lights......................... .69, 236
Filters Air Cleaner ............................ .368
Air Conditioning ..................... .97, 372
Engine Fuel ........................... .435
Engine Oil ......................... .368, 435
Engine Oil Disposal ...................... .368
Flashers Turn Signal ...................... .75, 158, 236
Flash-To-Pass ..............................72
Flat Tire Stowage .......................... .344
Flooded Engine Starting ..................... .243
Fluid, Brake ............................. .437
Fluid Capacities ........................... .434
Fluid Leaks .............................. .236
Fluid Level Checks Automatic Transmission ....................390
Brake ................................ .388
Power Steering ......................... .269
Fluids And Lubricants ...................... .435
Fog Lights ......................... .74, 157, 328
Fold Flat Load Floor ........................117
Folding Rear Seat ...........................43
Four-Way Hazard Flasher .....................320 Four Wheel Drive
......................... .257
Freeing A Stuck Vehicle ..................... .350
Front Axle (Differential) ..................... .392
Fuel ................................... .429
Adding .............................. .289
Additives .......................... .290, 430
Clean Air ............................. .430
Ethanol .............................. .431
Filler Cap (Gas Cap) ..................... .290
Filter ................................ .435
Gasoline .............................. .429
Light ................................ .156
Materials Added ..................... .290, 430
Methanol ............................. .431
Octane

Rating .......................... .429
Requirements .......................... .429
Tank Capacity .......................... .434
Fuses .................................. .331
Garage Door Opener (HomeLink) ............102, 108
Gas Cap (Fuel Filler Cap) .....................290
Gasoline, Clean Air ........................ .430
Gasoline, Reformulated ..................... .430
Gear Ranges ............................. .249
Gear Select Lever Override ....................349
516 INDEX

Passing................................72
Seat Belt Reminder ...................... .150
Security Alarm ......................... .151
Service ............................... .325
Tire Pressure Monitoring (TPMS) ..........155, 176
Traction Control ........................ .172
Transfer Case .......................... .260
Turn Signal ....................75, 158, 236, 326
Warning (Instrument Cluster Description) . . . .151, 158
Limited-Slip Differential ..................265, 393
Loading Vehicle ........................... .290
Tires................................. .400
Load Shed Battery Saver Mode ...................... .148
Battery Saver On ........................ .148
Electrical Load Reduction ...................148
Intelligent Battery Sensor ...................148
Locks Automatic Door ..........................40
Child Protection ..........................41
Power Door .............................37
Low Tire Pressure System .....................176
Lubrication, Body ......................... .379
Lug Nuts ............................ .343, 427Maintenance Free Battery
.....................365
Maintenance Schedule ...................... .359
Malfunction Indicator Light (Check Engine) . . . .153, 160
Manual, Service ........................... .510
Manual Transmission Fluid Level Check ....................... .393
Memory Feature (Memory Seat) .................43
Memory Seat ........................... .43, 48
Memory Seats And Radio .....................43
Methanol ............................... .431
Mirrors ..................................60
Electric Powered ..........................63
Heated .................................67
Memory ................................48
Outside ................................62
Rearview ...................... .60, 61, 62, 320
Trailer Towing ...........................67
Modifications/Alterations,
Vehicle................7
Monitor, Tire Pressure System ..................176
Mopar Parts ............................. .509
Multi-Function Control Lever ...................71
Navigation System (Uconnect GPS) ..............286
New Vehicle Break-In Period ..................244
12
INDEX 519

Load Capacity...................... .400, 401
Pressure Monitor System (TPMS) .............176
Pressure Warning Light ....................155
Quality Grading ........................ .418
Radial ............................... .406
Replacement ........................... .409
Rotation .............................. .416
Safety ............................ .394, 404
Sizes ................................ .396
Snow Tires .............................411
Spare Tire ...........................411,413
Spinning .............................. .407
Trailer Towing .......................... .301
Tread Wear Indicators .....................408
Wheel Nut Torque ....................343, 427
Tire Safety Information ...................... .394
Tongue Weight/Trailer Weight .................299
To Open Hood ........................... .101
Torque Converter Clutch .....................256
Towing ............................. .292, 352
Disabled Vehicle ........................ .352
Guide ................................ .299
Recreational ............................311
Weight ............................... .299
Towing Vehicle Behind A Motorhome ............311Traction
................................ .316
Traction Control .......................... .168
Trailer Sway Control (TSC) ....................173
Trailer Towing ............................ .292
Cooling System Tips ..................... .308
Hitches ............................... .298
Minimum Requirements ....................300
Mirrors ................................67
Tips ................................. .307
Trailer And Tongue Weight ..................299
Wiring ............................... .306
T

railer Towing Guide ....................... .299
Trailer Weight ............................ .299
Transfer Case ............................ .393
Electronically Shifted ..................... .260
Fluid ................................ .437
Transmission Automatic ......................... .248, 389
Fluid ................................ .437
Maintenance ........................... .389
Shifting .............................. .246
Transporting Pets ......................... .233
Tread Wear Indicators ...................... .408
Turn Signals ....................... .75, 158, 326
524 INDEX