tires RAM CHASSIS CAB 2022 Service Manual

SERVICING AND MAINTENANCE387
Summer tires do not contain the all season
designation or mountain/snowflake symbol on the
tire sidewall. Use Summer tires only in sets of four;
failure to do so may adversely affect the safety and
handling of your vehicle.
Snow Tires
Some areas of the country require the use of snow
tires during the Winter. Snow tires can be identified
by a “mountain/snowflake” symbol on the tire
sidewall. If you need snow tires, select tires
equivalent in size and type to the original
equipment tires. Use snow tires only in
sets of four; failure to do so may
adversely affect the safety and handling of your
vehicle. Snow tires generally have lower speed ratings than
what was originally equipped with your vehicle and
should not be operated at sustained speeds over
75 mph (120 km/h). For speeds above 75 mph
(120 km/h) refer to original equipment or an
authorized tire dealer for recommended safe
operating speeds, loading and cold tire inflation
pressures.
While studded tires improve performance on ice,
skid and traction capability on wet or dry surfaces
may be poorer than that of non-studded tires.
Some states prohibit studded tires; therefore, local
laws should be checked before using these tire
types.SPARE TIRES — IF EQUIPPED
For restrictions when towing with a spare tire
designated for temporary emergency use
Ú
page 178.
Spare Tire Matching Original Equipped Tire
And Wheel — If Equipped
Your vehicle may be equipped with a spare tire and
wheel equivalent in look and function to the
original equipment tire and wheel found on the
front or rear axle of your vehicle. This spare tire
may be used in the tire rotation for your vehicle. If
your vehicle has this option, refer to an authorized
tire dealer for the recommended tire rotation
pattern.
Compact Spare Tire — If Equipped
The compact spare is for temporary emergency
use only. You can identify if your vehicle is
equipped with a compact spare by looking at the
spare tire description on the Tire and Loading
Information Placard located on the driver’s side
door opening or on the sidewall of the tire.
Compact spare tire descriptions begin with the
letter “T” or “S” preceding the size designation.
Example: T145/80D18 103M.
T, S = Temporary Spare Tire
Since this tire has limited tread life, the original
equipment tire should be repaired (or replaced)
and reinstalled on your vehicle at the first
opportunity.
WARNING!
Do not use Summer tires in snow/ice conditions.
You could lose vehicle control, resulting in
severe injury or death. Driving too fast for
conditions also creates the possibility of loss of
vehicle control.
CAUTION!
Because of the reduced ground clearance, do
not take your vehicle through an automatic car
wash with a compact or limited use temporary
spare installed. Damage to the vehicle may
result.
8

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390SERVICING AND MAINTENANCE
SNOW TRACTION DEVICES
Use of traction devices require sufficient tire-to-body clearance. Due to limited clearance, the following snow traction devices are recommended. Follow these
recommendations to guard against damage:
Snow traction device must be of proper size for the tire, as recommended by the snow traction device manufacturer.
No other tire sizes are recommended for use with the snow traction device.
Please follow the table below for the recommended tire size, axle and snow traction device:
3500 SRW CAB CHASSIS
Trim Level Axle
Tire/Wheel SizeSnow Traction Device (maximum projection
beyond tire profile or equivalent)
4x2
4x4 Rear
LT275/70R18E U Class
3500 DRW CAB CHASSIS
Trim Level Axle
Tire/Wheel SizeSnow Traction Device (maximum projection
beyond tire profile or equivalent)
4x2 Rear
LT235/80R17E U Class
4x4 Front/Rear
4500/5500 DRW CAB CHASSIS
Trim Level Axle
Tire/Wheel SizeSnow Traction Device (maximum projection
beyond tire profile or equivalent)
4x2 Rear225/70R19.5G U Class
4x4
WARNING!
Using tires of different size and type (M+S, Snow) between front and rear axles can cause unpredictable handling. You could lose control and have a collision.

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SERVICING AND MAINTENANCE391
(Continued)
TIRE ROTATION RECOMMENDATIONS
Tires on the front and rear axles of vehicles
operate at different loads and perform different
steering, driving, and braking functions. For these
reasons, they wear at unequal rates.
These effects can be reduced by timely rotation of
tires. The benefits of rotation are especially
worthwhile with aggressive tread designs such as
those on On/Off Road type tires. Rotation will
increase tread life, help to maintain mud, snow,
and wet traction levels, and contribute to a
smooth, quiet ride. For the proper maintenance intervals
Úpage 329.
More frequent rotation is permissible if desired.
The reasons for any rapid or unusual wear should
be corrected prior to rotation being performed.

Tire Rotation (Rearward Cross)

NOTE:On Canadian vehicles only, if your vehicle is
equipped with All-Season type tires on the front
and On/Off Road type tires mounted on the rear,
do not use a front to back rotation pattern. Instead,
rotate your tires side to side at the recommended
intervals.
CAUTION!
To avoid damage to your vehicle or tires, observe
the following precautions:
Because of restricted traction device clear -
ance between tires and other suspension
components, it is important that only traction
devices in good condition are used. Broken
devices can cause serious damage. Stop the
vehicle immediately if noise occurs that could
indicate device breakage. Remove the
damaged parts of the device before further
use.
Install device as tightly as possible and then
retighten after driving about 0.5 mile
(0.8 km). Autosock devices do not require
retightening.
Do not exceed 30 mph (48 km/h).
Drive cautiously and avoid severe turns and
large bumps, especially with a loaded vehicle.
Do not drive for a prolonged period on dry
pavement.
Observe the traction device manufacturer’s
instructions on the method of installation,
operating speed, and conditions for use.
Always use the suggested operating speed of
the device manufacturer’s if it is less than
30 mph (48 km/h).
Do not use traction devices on a compact
spare tire.
CAUTION!
8

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392SERVICING AND MAINTENANCE
Dual Rear Wheels

Tire Rotation

The tires used on dual wheel assemblies should be
matched for wear to prevent overloading one tire in
a set. To check if tires are even, lay a straight edge
across all four tires. The straight edge should touch
all the tires.
NOTE:If your vehicle is equipped with a Tire Pressure
Information System (TPIS):
The Tire Pressure Information System (TPIS)
uses unique sensors in the inner rear wheels to
help identify them from the outer rear wheels,
because of this, the inner and outer wheel loca -
tions can’t be switched.
After a tire rotation is completed, as shown
below, the system can auto learn the locations
of each sensor ID. Auto learning/localization occurs when the vehicle ignition status is
changed from Off to On and speeds of greater
than 5 mph (8 km/h) are obtained and remain
over 5 mph (8 km/h) for at about a 15 minute
period. You may need to drive for 20 minutes to
account slower speeds and stops.
If the tires are rotated incorrectly, the Auto local
-
ization of the TPIS sensors will fail to locate
correctly resulting in incorrect locations for the
pressure values displayed in the Instrument
Cluster.
DEPARTMENT OF TRANSPORTATION
UNIFORM TIRE QUALITY GRADES
The following tire grading categories
were established by the National
Highway Traffic Safety Administration.
The specific grade rating assigned by the
tire's manufacturer in each category is
shown on the sidewall of the tires on
your vehicle.
All passenger vehicle tires must conform
to Federal safety requirements in
addition to these grades.
TREADWEAR
The Treadwear grade is a comparative
rating, based on the wear rate of the tire
when tested under controlled conditions
on a specified government test course.
For example, a tire graded 150 would
wear one and one-half times as well on
the government course as a tire graded
100. The relative performance of tires
depends upon the actual conditions of
their use, however, and may depart
significantly from the norm due to
CAUTION!
4500/5500 Dual Rear Tires may only have
one approved direction of rotation. This is to
accommodate the asymmetrical design (tread
pattern) of the On/Off road tire.
When replacing a flat, the spare tire may have
to be remounted on the rim or installed at a
different location to maintain the correct
placement of the tire on the wheel relative to
the tire/wheel position on the vehicle. For
example, if the spare is used to replace an
outer rear tire it will have to be remounted on
the rim so that the wheel is dished inward.
That way the tread design of asymmetrical
tires will maintain proper position.

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SERVICING AND MAINTENANCE393
variations in driving habits, service
practices, and differences in road
characteristics and climate.
TRACTION GRADES
The Traction grades, from highest to
lowest, are AA, A, B, and C. These grades
represent the tire's ability to stop on wet
pavement, as measured under
controlled conditions on specified
government test surfaces of asphalt and
concrete. A tire marked C may have poor
traction performance.
TEMPERATURE GRADES
The Temperature grades are A (the
highest), B, and C, representing the tire's
resistance to the generation of heat and
its ability to dissipate heat, when tested under controlled conditions on a
specified indoor laboratory test wheel.
Sustained high temperature can cause
the material of the tire to degenerate
and reduce tire life, and excessive
temperature can lead to sudden tire
failure. The grade C corresponds to a
level of performance, which all
passenger vehicle tires must meet
under the Federal Motor Vehicle Safety
Standard No. 109. Grades B and A
represent higher levels of performance
on the laboratory test wheel, than the
minimum required by law.
STORING THE VEHICLE
If you are storing your vehicle for more than three
weeks, we recommend that you take the following steps to minimize the drain on your vehicle's
battery:
Disconnect the negative cable from battery.
Any time you store your vehicle or keep it out of
service (i.e., vacation) for two weeks or more,
run the air conditioning system at idle for about
five minutes in the fresh air and high blower
setting. This will ensure adequate system lubri-
cation to minimize the possibility of compressor
damage when the system is started again.
BODYWORK
PROTECTION FROM ATMOSPHERIC
A
GENTS
Vehicle body care requirements vary according to
geographic locations and usage. Chemicals that
make roads passable in snow and ice and those
that are sprayed on trees and road surfaces during
other seasons are highly corrosive to the metal in
your vehicle. Outside parking, which exposes your
vehicle to airborne contaminants, road surfaces on
which the vehicle is operated, extreme hot or cold
weather and other extreme conditions will have an
adverse effect on paint, metal trim, and underbody
protection.
The following maintenance recommendations will
enable you to obtain maximum benefit from the
corrosion resistance built into your vehicle.WARNING!
The traction grade assigned to this tire is based
on straight-ahead braking traction tests, and
does not include acceleration, cornering,
hydroplaning, or peak traction characteristics.WARNING!
The temperature grade for this tire is
established for a tire that is properly inflated and
not overloaded. Excessive speed, underinflation,
or excessive loading, either separately or in
combination, can cause heat buildup and
possible tire failure.
8

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398TECHNICAL SPECIFICATIONS
Inspect the wheel mounting surface prior to
mounting the tire and remove any corrosion or
loose particles.
NOTE:Dual wheels are flat mounted, center piloted. The
lug nuts are a two-piece assembly. When the tires
are being rotated or replaced, clean these lug nuts
at the interface between the lug nut/bolt and the
washer. Do not oil wheel studs.

Two-Piece Lug Nut

Inspect the wheel mounting surface prior to
mounting the tire and remove any corrosion or
loose particles.
Wheel Mounting Surface

Retighten the wheel nuts in the same sequence to
the torques listed in the table. Go through the
sequence a second time to verify that specific
torque has been achieved. Retighten to
specifications after 25 miles (40 km) and check
the lug nut/bolt torque to be sure that all the lug
nuts/bolts are properly tightened.
8/10 Lug Nuts/Bolts Torque Patterns

It is recommended that wheel stud nuts be kept
torqued to specifications at all times. Torque wheel
stud nuts to specifications at each lubrication
interval.
All wheel nuts should be tightened occasionally to
eliminate the possibility of wheel studs being
sheared or the bolt holes in the wheels becoming
elongated. This is especially important during the
first few hundred miles/kilometers of operation to
allow the wheel nuts to become properly set. All
wheel nuts should first be firmly seated against the
wheel. The wheel nuts should then be tightened to
recommended torque. Tighten the wheel nuts to
1 — 10 Bolt Pattern
2 — 8 Bolt Pattern

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413
INDEX
A
Adaptive Cruise Control (ACC) (Cruise
Control)
................................................ 141, 143Adding Engine Coolant (Antifreeze)............... 355Adding Fuel.................................................... 169Additives, Fuel............................................... 399AdjustDown........................................................... 32Forward....................................................... 32Rearward..................................................... 32Up................................................................ 32Adjustable Pedals............................................ 37Advance Phone Connectivity......................... 231Air BagAir Bag Operation...................................... 286Air Bag Warning Light................................ 284Enhanced Accident Response......... 290, 327Event Data Recorder (EDR)....................... 327If Deployment Occurs................................ 289Knee Impact Bolsters................................ 286Maintaining Your Air Bag System.............. 291Maintenance............................................. 291Redundant Air Bag Warning Light.............285Transporting Pets...................................... 307Air Bag Light..................................95, 284, 307
Air Cleaner, Engine (Engine Air Cleaner
Filter)................................................... 342, 361Air Conditioner Maintenance........................ 344Air Conditioner Refrigerant........................... 344Air Conditioner System................................. 344Air Conditioning................................................ 58Air Conditioning Filter....................................... 61Air Conditioning System................................... 60Air Conditioning, Operating Tips....................... 60Air Filter........................................................ 342Air PressureTires......................................................... 383AlarmSecurity Alarm...................................... 23, 96Alterations/ModificationsVehicle......................................................... 10Antifreeze (Engine Coolant).......................... 355Capacities................................................. 403Disposal................................................... 356Anti-Lock Brake System (ABS)...................... 259Anti-Lock Warning Light................................ 100Assist, Hill Start............................................. 264Audio Settings............................................... 219Audio Systems (Radio).................................. 190Auto Down Power Windows............................. 71Automatic Door Locks...................................... 26
Automatic Headlights.......................................48Automatic Temperature Control (ATC)..............60Automatic Transmission....................... 122, 360Adding Fluid.............................................. 360Fluid And Filter Change............................. 360Fluid Change............................................. 360Fluid Level Check............................. 358, 359Fluid Type........................................ 360, 407Shifting..................................................... 126Special Additives...................................... 358Automatic Transmission Limp Home Mode... 125AutoPark....................................................... 105AUX Camera......................................... 165, 168Auxiliary Driving Systems.............................. 266Axle Fluid.....................................360, 361, 407Axle Lubrication................................... 360, 361
B
Back-Up......................................................... 159Back-Up Camera........................................... 159Battery................................................... 96, 340Blanket..................................................... 114Charging System Light.................................96Keyless Key Fob Replacement....................16Battery Saver Feature......................................51Belts, Seat.................................................... 307
11

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417
I
Idle-Up Feature
.............................................. 115Ignition............................................................ 18Switch......................................................... 18Illuminated Entry............................................. 52Inside Rearview Mirror............................ 38, 312Instrument Cluster...................... 78, 79, 80, 81Descriptions.............................................. 102Display........................................................ 81Engine Oil Reset.......................................... 82Instrument Panel Lens Cleaning.................... 396Integrated Trailer Brake Control.................... 179Interior Appearance Care............................... 395Interior Lights.................................................. 51Intermittent Wipers (Delay Wipers).................. 53Intervention Regeneration Strategy........ 90, 350Inverter Outlet (115V)...................................... 69
J
Jack Location................................................. 315Jack Operation............................................... 315Jacking And Tire Changing............................. 315Jump Starting................................................ 319
K
Key Fob Programming Additional Key Fobs
.............. 17Key Fob Battery Service (Remote Keyless
Entry)............................................................... 16
Key Fob Programming (Remote Keyless
Entry)............................................................... 17Keyless Enter 'n Go™.................... 25, 107, 109Passive Entry............................................... 25Keys................................................................. 15
L
Lane Change And Turn Signals........................ 50Lane Change Assist......................................... 50LaneSense.................................................... 156Latches......................................................... 309Hood............................................................ 73Lead Free Gasoline....................................... 399Leaks, Fluid.................................................. 309Life Of Tires................................................... 385Light Bulbs........................................... 309, 371LIghtsElectrinic Power Steering Pump.................. 97Oil Temperature........................................... 96Lights............................................................ 309Air Bag...................................... 95, 284, 307Automatic High Beam.................................. 48Brake Assist Warning............................... 263Brake Warning............................................. 95Bulb Replacement.................................... 371Cab Top Clearance................................... 375Cargo........................................................... 50Center Mounted Stop............................... 375
Courtesy/Reading........................................51Cruise....................................................... 102Daytime Running.........................................48Electronic Stability Program (ESP) Indicator..................................................96Exterior.............................................. 47, 309Fog............................................................ 374Four Wheel Drive Indicator....................... 139Hazard Warning Flasher........................... 311Headlights............................................ 47, 48High Beam...................................................48Hill Descent Control Indicator................... 263Illuminated Entry.........................................52Interior.........................................................51Lights On Reminder.....................................49Low Fuel......................................................99Malfunction Indicator (Check Engine)..........97Park.......................................................... 102Passing........................................................48Seat Belt Reminder.....................................94Security Alarm.............................................96Service...................................................... 371Traction Control........................................ 263Transfer Case........................................... 139Turn Signals..................... 50, 102, 309, 373Warning Instrument Cluster Descriptions.................................. 96, 102Limited-Slip Differential....................... 139, 36111

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418
Load Shed Battery Saver Mode
....................... 93Load Shed Battery Saver On............................ 93Load Shed Electrical Load Reduction.............. 93Load Shed Intelligent Battery Sensor.............. 93Loading Vehicle............................................. 172Tires.......................................................... 380Locks Automatic Door........................................... 26Child Protection........................................... 27Power Door.................................................. 24Low Tire Pressure System............................. 268Lubrication, Body........................................... 351Lug Nuts/Bolts.................................... 318, 397
M
Maintenance Free Battery............................. 340Maintenance Plan......................................... 334Maintenance Schedule............... 328, 332, 334Malfunction Indicator Light (Check Engine)..... 97ManualPark Release............................................. 323Service...................................................... 411Media Hub....................................................... 66Media Mode.................................................. 221Memory Seat................................................... 29Memory Settings............................................. 29Methanol....................................................... 399Mirrors............................................................. 38Electric Powered......................................... 40Heated........................................................ 42
Memory....................................................... 29Outside........................................................ 40Rearview.............................................38, 312Trailer Towing.............................................. 42Mirrors, Digital................................................. 39Mobile App.................................................... 235Modifications/AlterationsVehicle......................................................... 10Monitor, Tire Pressure System...................... 268Mopar Parts.................................................. 411MP3 Control..................................................... 66Multi-Function Control Lever............................ 47
N
Navigation System (Uconnect GPS).............. 159New Vehicle Break-In Period................ 118, 119Noise ControlMaintenance............................................ 361Tampering Prohibited............................... 362Noise Emission Warranty..................... 361, 362
O
Occupant Restraints..................................... 275Octane Rating, Gasoline (Fuel)..................... 399Oil Change Indicator..................................... 332Oil Filter, Change.......................................... 342Oil Filter, Selection........................................ 342Oil Pressure Light............................................. 96Oil Reset.......................................................... 82Oil, Engine............................................ 341, 404
Capacity.................................................... 403Dipstick..................................................... 340Disposal.................................................... 342Filter................................................ 342, 404Filter Disposal........................................... 342Identification Logo.................................... 342Materials Added To................................... 342Pressure Warning Light................................96Recommendation..................................... 341Synthetic................................................... 342Onboard Diagnostic System.......................... 103Operating Precautions.................................. 103Operator ManualOwner's Manual........................................ 411Outside Rearview Mirrors.................................40Overdrive....................................................... 130Overdrive OFF Switch.................................... 130Overheating, Engine...................................... 322
P
Paint Care..................................................... 393Pair (Link) Uconnect Phone To A Mobile
Phone
S
.................................................... 225Parking Brake............................................... 119ParkSense System, Rear............................... 151Passive Entry....................................................25Pedals, Adjustable...........................................37Pets............................................................... 307Phone Mode.................................................. 223Placard, Tire And Loading Information.......... 380

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419
Power Distribution Center (Fuses)
....................... 364Door Locks.................................................. 24Mirrors......................................................... 40Outlet (Auxiliary Electrical Outlet)......... 68, 69Seats........................................................... 32Sliding Rear Window................................... 72Steering.............................................. 40, 140Take-Off Adapter....................................... 140Take-Off Operation.................................... 140Windows...................................................... 71Power SeatsDown........................................................... 32Forward....................................................... 32Rearward..................................................... 32Recline........................................................ 32Tilt............................................................... 32Up................................................................ 32Power Steering Fluid...................................... 407Pregnant Women And Seat Belts...................282Preparation For Jacking................................. 315Presets.......................................................... 219Profile Settings.............................................. 192Programmable Features................................ 191PTO (Power Take-Off)..................................... 140
R
Radial Ply Tires............................................. 384Radiator Cap (Coolant Pressure Cap).. 355, 356RadioPresets..................................................... 219Settings.................................................... 191Radio Controls.............................................. 214Radio Mode.................................................. 214Radio Operation................................... 214, 252Radio Remote Controls................................. 213Rain Sensitive Wiper System........................... 54Rear Axle (Differential)......................... 360, 361Rear Camera................................................. 161Rear ParkSense System............................... 151Rear Window, Sliding....................................... 72Recreational Towing..................................... 185Shifting Into Transfer Case Neutral (N)..... 186Shifting Out Of Transfer Case Neutral (N)........................................... 187Reformulated Gasoline................................. 399Refrigerant.................................................... 344Registering SiriusXM Guardian..................... 234Release, Hood................................................. 73Reminder, Seat Belt...................................... 276Remote Features, Door Lock/Unlock... 240, 248Remote Features, Horn And Lights............... 241Remote Features, Starting................... 241, 249
Remote Keyless Entry......................................15Programming Additional Key Fobs...............17Remote Sound System (Radio) Control......... 213Remote Start (Diesel).......................................22Remote Start (Gasoline)...................................20Remote StartingExit Remote Start Mode...............................21Replacement Bulbs....................................... 371Replacement Tires........................................ 386Reporting Safety Defects.............................. 411Resetting Perform Service Indicator............. 333Restraints, Child............................................ 291Restraints, Head..............................................35Roadside Assistance............................ 241, 248Rotation, Tires............................................... 391
S
Safety............................................................ 213Safety Checks Inside Vehicle........................ 307Safety Checks Outside Vehicle...................... 309Safety Defects, Reporting............................. 411Safety Features............................................. 213Safety Information, Tire................................. 376Safety Tips.................................................... 307Safety, Exhaust Gas...................................... 309Satellite Radio............................................... 215Saved Radio Stations.................................... 219Schedule, Maintenance................................ 32811

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