2020 Ram 3500 Chassis Cab mileage

106GETTING TO KNOW YOUR INSTRUMENT PANEL
Service DEF System See Dealer — This
message will display when the fault is initially
detected, each time the vehicle is started,
and periodically during driving. The message
will be accompanied by a single chime. We
recommend you drive to the nearest autho -
rized dealer and have your vehicle serviced
as soon as possible.
5 MPH Max Speed in 150 mi Service DEF
System See Dealer — This message will
display if the DEF system has not been
serviced after the “Service DEF System – See
Dealer” message is displayed. This message
will continuously display until the mileage
counter reaches zero, and will be accompa -
nied by a periodic chime. The message will
continue to countdown until it reaches zero
unless the vehicle is serviced. We recom -
mend you drive to your nearest authorized
dealer and have your vehicle serviced imme -
diately.
NOTE:
Under some circumstances this mileage
counter may start with a value of less than
150 miles (241 km). For example, if recurring faults are detected in a time interval of less
than 40 hours, the counter may restart at the value where it stopped when a previous fault
was temporarily remedied, or at a minimum of
50 miles (80 km).
5 MPH Max Speed on Restart, Long Idle or
Refuel Service DEF See Dealer
— This
message will continuously display when the
mileage counter reaches zero, and will be
accompanied by a periodic chime.
The vehicle will only be capable of a
maximum speed of 5 mph upon the first of
the following conditions to occur:
If the vehicle is shutoff and restarted.
If the vehicle is idled for an extended
period of time, approximately one hour or
greater.
If the system detects that the level of fuel in the tank has increased.
5 MPH Max Speed Service DEF System See
Dealer — This message will continuously
display, and will be accompanied by a peri -
odic chime. Although the vehicle can be
started and placed in gear, the vehicle will
only operate at a maximum speed of 5 mph.
Your vehicle will require towing, see an
authorized dealer for service. NOTE:
When this message is displayed, the engine can
still be started. However, the vehicle will only
operate at a maximum speed of 5 mph.
Incorrect DEF Detected See Dealer
— This
message will display when the fault is initially
detected, each time the vehicle is started,
and periodically during driving. The message
will be accompanied by a single chime. We
recommend you drive to the nearest autho -
rized dealer and have your vehicle serviced
as soon as possible.
RAM Active Air System
Your vehicle is equipped with an advanced Ram
Active Air system that provides enhanced
performance, especially when towing under
demanding hot or high altitude conditions. If the
instrument cluster display displays the
message “Active Airbox Service Required See
Dealer”, vehicle performance may be reduced
until service is performed by an authorized RAM
dealer.

2020_RAM_CHASSIS_CAB_OM_USA=GUID-6C67832B-7839-4CCF-BEFC-CDF988F949EA=1=en=.book Page 106

SERVICING AND MAINTENANCE331
Maintenance Plan — Gas Engine
Mileage or time passed
(whichever 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
Additional Inspections
Inspect the CV/Universal joints. X X X X X X X X X X X X X X
Inspect front suspension, tie rod
ends, and replace if necessary. X
X X X X XX
Inspect the front and rear axle
surfaces. If gear oil leakage is
suspected, check the fluid level. If
using your vehicle for police, taxi,
fleet, off-road or frequent trailer
towing, change axle fluid. X
X X X X XX
Inspect the brake linings, parking
brake function. X
X X X X XX
7

2020_RAM_CHASSIS_CAB_OM_USA=GUID-6C67832B-7839-4CCF-BEFC-CDF988F949EA=1=en=.book Page 331

332SERVICING AND MAINTENANCE
Additional Maintenance

Replace engine air filter.
XX X X X

Replace spark plugs.
1
X

Flush and replace the engine coolant
at 10 years or
150,000 miles (240,000 km)
whichever comes first.
X
X

Change the automatic transmission
fluid (AS66RC Transmission Only).
X
X X

Change the automatic transmission
fluid and sump filter (AS66RC
Transmission Only).
X
X

Inspect the transfer case fluid, change
for any of the following: police, taxi,
fleet, or frequent trailer towing.
X
X X X X

Mileage or time passed (whichever 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

2020_RAM_CHASSIS_CAB_OM_USA=GUID-6C67832B-7839-4CCF-BEFC-CDF988F949EA=1=en=.book Page 332

SERVICING AND MAINTENANCE333
(Continued)
Heavy Duty Use Of The Vehicle
Change engine oil at 4,000 miles (6,500 km) or
350 hours of engine run time if the vehicle is
operated in a dusty and off road environment or
is operated predominately at idle or only very
low engine RPM. This type of vehicle use is
considered Severe Duty.
Change the transfer case fluid.
X
Inspect and replace PCV valve if
necessary. X
1. The spark plug change interval is mileage based only, yearly intervals do not apply.
Mileage or time passed
(whichever 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
WARNING!
You can be badly injured working on or
around a motor vehicle. Do only service
work for which you have the knowledge and
the right equipment. If you have any doubt
about your ability to perform a service job,
take your vehicle to a competent mechanic.Failure to properly inspect and maintain
your vehicle could result in a component
malfunction and effect vehicle handling
and performance. This could cause an acci -
dent.
WARNING! (Continued)7

2020_RAM_CHASSIS_CAB_OM_USA=GUID-6C67832B-7839-4CCF-BEFC-CDF988F949EA=1=en=.book Page 333

336SERVICING AND MAINTENANCE
Maintenance Plan — Cummins Diesel Engine
Mileage or time passed
(whichever comes first):
7,500
15,000
22,500
30,000
37,500
45,000
52,500
60,000
67,500
75,000
82,500
90,000
97,500
105,000
112,500
120,000
127,500
135,000
142,500
150,000
Or Months:6
12
18
24
30
36
42
48
54
60
66
72
78
84
90
96
102
108
114
120
Or Kilometers:
12,000
24,000
36,000
48,000
60,000
72,000
84,000
96,000
108,000
120,000
132,000
144,000
156,000
168,000
180,000
192,000
204,000
216,000
228,000
240,000
Change engine oil every
15,000 miles (24,000 km) or
12 months or 500 hours or
sooner if prompted by the oil
change indicator system,
whichever comes first.
1
X X X X X X X X X X
Additional Inspections
Check the Diesel Exhaust Fluid
(DEF) tank, refill if necessary. X X X X X X X X X X X X X X X X X X X X
Rotate the tires. X X X X X X X X X X X X X X X X X X X X
Inspect the CV/Universal joints. X X X X X X X X X X X X X X X X X X X X
Inspect front end, and lubricate
— If equipped with serviceable
fittings. X
X X X X X X X X X X X X X X X X X X X

2020_RAM_CHASSIS_CAB_OM_USA=GUID-6C67832B-7839-4CCF-BEFC-CDF988F949EA=1=en=.book Page 336

SERVICING AND MAINTENANCE337
Inspect engine air filter, replace
if necessary. 2X X X X X X X X X X
Inspect the front suspension,
tie rod ends and boot seals for
cracks or leaks and all parts for
damage, wear, improper
looseness or end play; replace if
necessary. X X X X X X X X X X
Inspect the brake linings. XXXXXX
Inspect and adjust parking
brake. X
XXXXX
Inspect drive belt; replace as
necessary. X
XXXXX
Inspect wheel bearings. XXXX X
Mileage or time passed
(whichever comes first):
7,500
15,000
22,500
30,000
37,500
45,000
52,500
60,000
67,500
75,000
82,500
90,000
97,500
105,000
112,500
120,000
127,500
135,000
142,500
150,000
Or Months:6
12
18
24
30
36
42
48
54
60
66
72
78
84
90
96
102
108
114
120
Or Kilometers:
12,000
24,000
36,000
48,000
60,000
72,000
84,000
96,000
108,000
120,000
132,000
144,000
156,000
168,000
180,000
192,000
204,000
216,000
228,000
240,000
7

2020_RAM_CHASSIS_CAB_OM_USA=GUID-6C67832B-7839-4CCF-BEFC-CDF988F949EA=1=en=.book Page 337

338SERVICING AND MAINTENANCE
Additional Maintenance
Replace cabin air filter. XXXXXX
Replace engine fuel filter
element. X X X X X X X X X X
Replace chassis mounted fuel
filter element. X X X X X X X X X X
Inspect the front and rear axle
surfaces. If gear oil leakage is
suspected, check the fluid level.
If using your vehicle for police,
taxi, fleet, off-road or frequent
trailer towing change the axle
fluid.
3
Inspect the transfer case fluid
(4x4), change for any of the
following: police, taxi, fleet, or
frequent trailer towing. X
XXX X
Mileage or time passed
(whichever comes first):
7,500
15,000
22,500
30,000
37,500
45,000
52,500
60,000
67,500
75,000
82,500
90,000
97,500
105,000
112,500
120,000
127,500
135,000
142,500
150,000
Or Months:6
12
18
24
30
36
42
48
54
60
66
72
78
84
90
96
102
108
114
120
Or Kilometers:
12,000
24,000
36,000
48,000
60,000
72,000
84,000
96,000
108,000
120,000
132,000
144,000
156,000
168,000
180,000
192,000
204,000
216,000
228,000
240,000

2020_RAM_CHASSIS_CAB_OM_USA=GUID-6C67832B-7839-4CCF-BEFC-CDF988F949EA=1=en=.book Page 338

SERVICING AND MAINTENANCE339
Change the transfer case fluid
(4x4). X
X
Change automatic transmission
fluid (AS69RC transmission
only). X
XXX X
Change the automatic
transmission fluid and sump
filter (AS69RC transmission
only). X
X
Change automatic transmission
fluid and filter(s) if using your
vehicle for any of the following:
police, fleet, or frequent trailer
towing (68RFE transmission
only). X
X
Mileage or time passed
(whichever comes first):
7,500
15,000
22,500
30,000
37,500
45,000
52,500
60,000
67,500
75,000
82,500
90,000
97,500
105,000
112,500
120,000
127,500
135,000
142,500
150,000
Or Months:6
12
18
24
30
36
42
48
54
60
66
72
78
84
90
96
102
108
114
120
Or Kilometers:
12,000
24,000
36,000
48,000
60,000
72,000
84,000
96,000
108,000
120,000
132,000
144,000
156,000
168,000
180,000
192,000
204,000
216,000
228,000
240,000
7

2020_RAM_CHASSIS_CAB_OM_USA=GUID-6C67832B-7839-4CCF-BEFC-CDF988F949EA=1=en=.book Page 339