2023 JEEP WRANGLER service interval

332SERVICING AND MAINTENANCE
FRONT/REAR AXLE FLUID
For normal service, periodic fluid level checks are not
required. When the vehicle is serviced for other reasons
the exterior surfaces of the axle assembly should be
inspected. If gear oil leakage is suspected inspect the fluid
level.
Fluid Level Check
Lubricant should be approximately 1/8 inch (3 mm) below
the bottom edge of the oil fill hole.
NOTE:Make sure that the vehicle is level and supported by the
axles.
Adding Fluid
Add lubricant only at the fill hole and only to the level
specified above.
Selection Of Lubricant
Use only manufacturer recommended fluid Úpage 376.
TRANSFER CASE
Fluid Level Check
The fluid level should be to the bottom edge of the fill hole
when the vehicle is in a level position.

Transfer Case

Drain And Refill
For the proper maintenance intervals Úpage 307.
Selection Of Lubricant
Use only the manufacturer recommended fluid Úpage 376.
MANUAL TRANSMISSION — IF EQUIPPED
Fluid Level Check
Check the fluid level by removing the fill plug. The fluid
level should be between the bottom of the fill hole and a
point not more than 3/16 of an inch (4.76 mm) below the
bottom of the hole.
Add fluid, if necessary, to maintain the proper level.
Frequency Of Fluid Change
Under normal operating conditions, the fluid installed at
the factory will give satisfactory lubrication for the life of
the vehicle. If the fluid becomes contaminated with water,
it should be changed immediately. Otherwise, change the
fluid as recommended in the Maintenance Plan. Refer to
the Maintenance Plan for the proper maintenance
intervals
Úpage 307.
Selection Of Lubricant
Use only the manufacturer recommended manual
transmission fluid Úpage 376.

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
cylinder reservoir cap secured at all times. Brake
fluid in an 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!
1 — Fill hole
2 — Drain hole

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TECHNICAL SPECIFICATIONS371
FUEL REQUIREMENTS – DIESEL ENGINE
Federal law requires that you must fuel this vehicle with
Ultra Low Sulfur Highway Diesel fuel (15 ppm Sulfur
maximum) and prohibits the use of Low Sulfur Highway
Diesel fuel (500 ppm Sulfur maximum) to avoid damage to
the emissions control system.
Use good quality diesel fuel from a reputable supplier in
your vehicle. For most year-round service, No. 2 diesel fuel
meeting ASTM (formerly known as the American Society
for Testing and Materials) specification D-975 Grade S15
will provide good performance. If the vehicle is exposed to
extreme cold (below 20°F or -7°C), or is required to
operate at colder-than-normal conditions for prolonged
periods, use climatized No. 2 diesel fuel or dilute the No.
2 diesel fuel with 50% No. 1 diesel fuel. This will provide
better protection from fuel gelling or wax-plugging of the
fuel filters.
Diesel fuel is seldom completely free of water. To prevent
fuel system trouble, drain the accumulated water from the
fuel/water separator using the fuel/water separator drain
provided on the fuel filter housing. If you buy good quality
fuel and follow the cold weather advice above, fuel
conditioners should not be required in your vehicle. If
available in your area, a high cetane “premium” diesel fuel
may offer improved cold-starting and warm-up
performance.
DIESEL FUEL SPECIFICATIONS
This diesel engine has been developed to take advantage
of the high energy content and generally lower cost No. 2
Ultra Low Sulfur diesel fuel or No. 2 Ultra Low Sulfur
climatized diesel fuels.
NOTE:
If you accidentally fill the fuel tank with gasoline on your
diesel vehicle, do not start the engine. Damage to the
engine and fuel system could occur. Please call an
authorized dealer for service.
 A maximum blend of 5% biodiesel meeting ASTM spec -
ification D-975 may be used with your diesel engine
without any adjustments to regular service schedules.
 Commercially available fuel additives are not neces -
sary for the proper operation of your diesel engine.
 No. 1 Ultra Low Sulfur diesel fuel should only be used
where extended arctic conditions (-10°F or -23°C)
exist.
BIODIESEL FUEL REQUIREMENTS
A maximum blend of 5% biodiesel meeting ASTM
specification D975 is recommended for use with your
diesel engine. If frequent operation with Biodiesel blends
that are between 6% and 20% (B6–B20) is desired, the
maintenance schedule is subject to shorter intervals. The oil and filter change along with fuel filter replacement
is subject to shorter intervals when operating your engine
on biodiesel greater than 5%. Do not use biodiesel greater
than 20%.
For regular use of biodiesel blends between 6% and 20%
(B6–B20) it is important that you understand and comply
with these requirements
Úpage 311.
Biodiesel is a fuel produced from renewable resources
typically derived from animal fat, rapeseed oil (Rapeseed
Methyl Ester (RME) base), or soybean oil (Soy Methyl Ester
(SME or SOME) base).
Biodiesel fuel has inherent limitations which require that
you understand and adhere to the following requirements
if you use blends of Biodiesel between 6% and 20%
(B6–B20). There are no unique restrictions for the use of
B5.
WARNING!
Do not use alcohol or gasoline as a fuel blending agent.
They can be unstable under certain conditions and
hazardous or explosive when mixed with diesel fuel.
CAUTION!
If the Water in Fuel Indicator Light remains on, DO NOT
START engine before you drain the water from the fuel
filter(s) to avoid engine damage
Úpage 321.
CAUTION!
Failure to comply with Oil Change requirements for
vehicles operating on biodiesel blends between 6% and
20% (B6–B20) will result in premature engine wear.
Such wear is not covered by the New Vehicle Limited
Warranty.
CAUTION!
Use of blends greater than 20% is not approved. Use of
blends greater than 20% can result in engine damage.
Such damage is not covered by the New Vehicle Limited
Warranty.
9

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376TECHNICAL SPECIFICATIONS
CHASSIS FLUIDS AND LUBRICANTS
Fuel Selection — 3.0L Diesel Engine Use good quality diesel fuel from a reputable supplier in your vehicle. Federal law
requires that you must fuel this vehicle with Ultra Low Sulfur Highway Diesel fuel (15 ppm
Sulfur maximum) and prohibits the use of Low Sulfur Highway Diesel fuel (500 ppm
Sulfur maximum) to avoid damage to the emissions control system. For most year-round
service, Number 2 diesel fuel meeting ASTM specification D-975 Grade S15 will provide
good performance. We recommend using a blend of up to 5% biodiesel, meeting ASTM
specification D-975 with your diesel engine.
This vehicle is compatible with biodiesel blends greater than 5% but no greater than 20%
biodiesel meeting ASTM specification D-7467 provided the shortened maintenance
intervals are followed as directed.
Diesel Exhaust Fluid — 3.0L Diesel Engine Mopar® Diesel Exhaust Fluid (DEF) (API Certified) or equivalent that has been API
Certified to the ISO 22241 standard. Use of fluids not API Certified to ISO 22241 may
result in system damage.
Component
Fluid, Lubricant, or Genuine Part
Automatic Transmission – If Equipped Use only Mopar® ZF 8 & 9 Speed Automatic Transmission Fluid (ATF) or equivalent.
Failure to use the correct fluid may affect the function or performance of your
transmission.
Manual Transmission – If Equipped We recommend using Mopar® ATF+4 Automatic Transmission Fluid.
Transfer Case We recommend using Mopar® ATF+4 Automatic Transmission Fluid.
Front Axle Differential We recommend using Mopar® Gear & Axle Lubricant (SAE 75W85)(API GL-5).
Rear Axle Differential (M200 Sales Code DRZ) We recommend using Mopar® Gear & Axle Lubricant (SAE 75W140)(API GL-5).
Rear Axle Differential (M220 Sales Codes DRE/DRF) We recommend using Mopar® Gear & Axle Lubricant (SAE 75W85)(API GL-5). Models
equipped with Trac-Lok Limited Slip Differential require a friction modifier additive.
Brake Master Cylinder We recommend using Mopar® DOT 3 Brake Fluid, SAE J1709.
Power Steering Reservoir We recommend using Mopar® Electric Steering Pump Fluid.
ComponentFluid, Lubricant, or Genuine Part

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