2021 RAM 1500 brake fluid

400SERVICING AND MAINTENANCE
MAINTENANCE PLAN — DIESEL FUEL UP TO B5 BIODIESEL
Refer to the Maintenance Schedules for required maintenance.
NOTE:
Using white lithium grease, lubricate the door hinge roller pivot joints twice a year to prevent premature wear.
At Every Oil Change Interval As Indicated By Oil Change Indicator System:
Change oil and filter.
Completely fill the Diesel Exhaust Fluid tank.
Drain water from fuel filter assembly.
Rotate the tires. Rotate at the first sign of irregular wear, even if it occurs before the oil indicator system turns on.
Inspect battery and clean and tighten terminals as required.
Inspect the CV/Universal joints.
Inspect brake pads, shoes, rotors, drums, hoses and park brake.
Inspect engine cooling system protection and hoses.
Inspect exhaust system.
Inspect engine air cleaner if using in dusty or off-road conditions. Replace engine air cleaner, as necessary.
At Every Second Oil Change Interval As Indicated By Oil Change Indicator System:
Change fuel filter.

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SERVICING AND MAINTENANCE401
Mileage or time passed (whichever comes first)
10,000
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: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Or Kilometers:
16,000
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
Completely fill the Diesel Exhaust Fluid tank. 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
Inspect front suspension, tie rod ends, and replace if
necessary. X X X X X X X
Inspect the front and rear axle fluid. 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. X
XXXX
Inspect the brake linings, parking brake function. X X X X X X X
Additional Maintenance
Replace cabin air filter X X X X X X X
Drain water from fuel filter assembly. X X X X X X X X X X X X X X X
Replace fuel filter and drain water from the fuel filter
assembly.
1Fuel filter replacement intervals should be every second oil change and must not exceed 20,000 miles (32,000 km) if using diesel fuel up to B5.
8

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404SERVICING AND MAINTENANCE
ENGINE COMPARTMENT
3.6L ENGINE WITH STOP/START
1 — Motor Generator Unit Coolant Reservoir Pressure Cap 6 — Battery
2 — Engine Coolant Reservoir Pressure Cap 7 — Power Distribution Center (Fuses)
3 — Engine Oil Dipstick 8 — Washer Fluid Reservoir Cap
4 — Engine Oil Fill 9 — Engine Air Cleaner Filter
5 — Brake Fluid Reservoir

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SERVICING AND MAINTENANCE405
5.7L ENGINE WITHOUT STOP/START
1 — Engine Air Cleaner Filter 6 — Battery
2 — Engine Coolant Pressure Cap 7 — Power Distribution Center (Fuses)
3 — Engine Oil Fill 8 — Washer Fluid Reservoir Cap
4 — Engine Oil Dipstick 9 — Engine Coolant Reservoir Cap
5 — Brake Fluid Reservoir Cap
8

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406SERVICING AND MAINTENANCE
5.7L ENGINE WITH STOP/START
1 — Engine Air Cleaner Filter 6 — Battery
2 — Engine Coolant Pressure Cap 7 — Power Distribution Center (Fuses)
3 — Engine Oil Fill 8 — Washer Fluid Reservoir Cap
4 — Engine Oil Dipstick 9 — Engine Coolant Reservoir Cap
5 — Brake Fluid Reservoir Cap

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SERVICING AND MAINTENANCE407
3.0L DIESEL ENGINE
1 — Engine Air Cleaner Filter 5 — Brake Fluid Reservoir Cap
2 — Engine Coolant Reservoir Pressure Cap 6 — Battery
3 — Engine Oil Dipstick 7 — Power Distribution Center (Fuses)
4 — Engine Oil Fill 8 — Washer Fluid Reservoir Cap
8

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SERVICING AND MAINTENANCE425
(Continued)
and through another hose to the intake
manifold of the engine. This cooling process
enables more efficient burning of fuel resulting
in fewer emissions.
To guarantee optimum performance of the
system, keep the surfaces of the charge air
cooler, condenser and radiator clean and free
of debris. Periodically check the hoses leading
to and from the charge air cooler for cracks or
loose clamps resulting in loss of pressure and
reduced engine performance.
BRAKE SYSTEM
In order to ensure brake system performance,
all brake system components should be
inspected periodically Ú page 395.
Fluid Level Check — Brake Master Cylinder
The fluid level of the brake master cylinder
should be checked whenever the vehicle is
serviced, or immediately if the brake system
warning light is on. 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, fluid level can be expected to fall as the
brake pads wear. Brake fluid level should be
checked when pads are replaced. If the brake
fluid is abnormally low, check the system for
leaks Úpage 478.
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 manufacturer's recommended
brake fluid Ú page 478. Using the wrong
type of brake fluid can severely damage
your brake system and/or impair its perfor -
mance. 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)
8

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478TECHNICAL SPECIFICATIONS
CHASSIS FLUIDS AND LUBRICANTS
Component Fluid, Lubricant, or Genuine Part
Automatic TransmissionUse 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 – 48-11 Active On-Demand 2–speed
Transfer Case (With 4WD AUTO) We recommend you use Mobil Fluid LT.
Transfer Case – 48-12 Part Time 2–Speed Transfer
Case (Without 4WD AUTO) We recommend you use Shell Spirax S2 ATF A389.
Front Axle We recommend you use Mopar GL-5 Synthetic Axle Lubricant SAE 75W-85.
Rear Axle (3.21/3.55) We recommend you use Mopar Synthetic Gear Lubricant SAE 75W-90 (MS-A0160).
Limited-Slip Rear Axles require the addition of 5 oz. (148 ml) Mopar Limited Slip Additive
(MS-10111).
Rear Axle (3.92) We recommend you use Mopar Synthetic Gear Lubricant SAE 75W-140 (MS-8985).
Limited-Slip Rear Axles require the addition of 5 oz. (148 ml) Mopar Limited Slip Additive
(MS-10111).
Max Tow Rear Axle (3.92) We recommend You Use Dana SAE 80W90 Axle Lubricant.
Brake Master Cylinder We recommend you use Mopar DOT 3 Brake Fluid, SAE J1709.

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