Skip to content
WESTCDJR

Jeep Wrangler · Model year 2018

2018 Jeep Wrangler specs, maintenance & manuals

Owner and shopper reference for the 2018 Jeep Wrangler, built from Stellantis and Mopar data: the factory spec sheet, the maintenance schedule, fluid capacities and 20 manufacturer publications.

Schedule covers
150k miles
Publications
20
Versions
2

2018 Jeep Wrangler specs & features

Engines, gear ratios, suspension, brakes, dimensions and capacities as published in the manufacturer's 2018 specification sheets.

General information+
Vehicle TypeSport-utility vehicle
Assembly PlantToledo Supplier Park, Toledo, Ohio
EPA Vehicle ClassMultipurpose vehicle
Introduction Date2017
Body/chassis+
LayoutLongitudinal front engine, four-wheel drive
ConstructionLadder-type frame, open steel and aluminum body
Engine: 3.6-liter Pentastar V-6+
AvailabilityStandard — all models
Type and Description60-degree, V-type, liquid-cooled
Displacement (cu. in. / cc)220 cu. in. (3,604 cu. cm)
Bore x Stroke3.78 x 3.27 (96 x 83)
Valve SystemChain-driven DOHC, 24 valves and hydraulic end-pivot roller rockers
Fuel InjectionSequential, multiport, electronic, returnless
ConstructionAluminum deep-skirt block, aluminum alloy heads
Compression Ratio11.3:1
Power (SAE net) (hp / kW@rpm)285 hp (209 kW) at 6,400 rpm
Torque (SAE net) (lb.-ft. / N•m)260 lb.-ft. (353 N•m) at 4,800 rpm
Max. Engine Speed (rpm)6,600 rpm (electronically limited)
Fuel RequirementUnleaded regular, 87 octane (R + M)/2
Fuel Tank Capacity (gallons)18.5 (2-door), 21.5 (4-door)
Oil Capacity5.0 quarts (4.7 liters)
Coolant Capacity10 quarts (10.1 liters)
Emission ControlsDual three-way catalytic converters, heated oxygen sensors and internal engine features
Max. Gross Trailer Weight2,000 lbs. (2-door), 3,500 lbs. (4-door)
EPA Fuel Economy mpg (city/hwy/combined)18/23/20 — automatic; 17/23/19 — manual
Assembly PlantSaltillo South Engine Plant, Saltillo, Coahuila, Mexico
Engine: 2.0-liter turbo I-4+
AvailabilityAvailable — all models
Type and DescriptionI-4 16-valve with direct injection, turbo charging, with throttled, cooled EGR
Displacement (cu. in. / cc)121 cu. in. (1995 cu. cm)
Bore x Stroke3.31 x 3.54 (84 x 90)
Valve SystemChain-driven DOHC, 16 valves
Fuel InjectionDirect Injection
ConstructionAluminum block, aluminum alloy heads
Compression Ratio10:01
Power (SAE net) (hp / kW@rpm)270 hp (200 kW) at 5,250 rpm
Torque (SAE net) (lb.-ft. / N•m)295 lb.-ft. (400 N•m) at 3,000 rpm
Max. Engine Speed (rpm)5,800 rpm (electronically limited)
Fuel RequirementMinimum unleaded regular, 87 octane (R + M)/2, 91 octane or higher recommended for optimum fuel economy and performance
Fuel Tank Capacity (gallons)18.5 (2-door), 21.5 (4-door)
Oil Capacity5 quarts (4.7 liters)
Coolant Capacity9.9 quarts (9.4 liters)
Emission ControlsGPEC4 engine-management system with close-coupled catalyst; and wide range O2 sensor
Max. Gross Trailer Weight2,000 lbs. (2-door), 3,500 lbs. (4-door)
EPA Fuel Economy mpg (city/hwy/combined)TBD — automatic; TBD — automatic
Assembly PlantTermoli, Italy and Trenton South Engine Plant, Trenton, Mich.

The sheet prints "TBD — automatic" twice for fuel economy; both lines are kept as printed.

Transmission: 850RE automatic, eight-speed overdrive+
AvailabilityStandard — 2.0-liter I-4; Optional — 3.6-liter V-6
DescriptionAdaptive electronic control or Electronic Range Select (ERS) driver-interactive manual control and electronically modulated torque converter clutch
1st4.71
2nd3.13
3rd2.10
4th1.67
5th1.28
6th1.00
7th0.84
8th0.67
Reverse3.53
Transmission: D478 manual, six-speed with overdrive+
AvailabilityStandard — 3.6-liter V-6
DescriptionSynchronized in all forward gears and Reverse, multi-rail shift system with top-mounted shift lever
1st5.13
2nd2.63
3rd1.53
4th1.00
5th0.81
6th0.72
Reverse4.49
Final Drive ratio3.45 standard, 3.73 optional (4.10 Rubicon)
Transfer case: NV241 Command-Trac+
AvailableStandard — Sport and Sahara
TypePart-time
Operating Modes2WD High; 4WD High; Neutral; 4WD Low
Low Range Ratio2.72:1

Operating modes are printed with doubled semicolons in the source; shown as a plain list.

Transfer case: NV241OR Rock-Trac+
AvailableStandard — Rubicon
TypePart-time
Operating Modes2WD High; 4WD High; Neutral; 4WD Low
Low Range Ratio4.0:1
Axle Ratio3.45 standard; 4.10 standard Rubicon
Transfer case: MP3022 Selec-Trac+
AvailableOptional – Sahara
TypeFull-time
Operating Modes2WD High; 4WD High; Neutral; 4WD Low
Low Range Ratio4.0:1
Axle Ratio3.45 standard; 4.10 standard Rubicon with manual (optional for automatic)
Axles+
Front3rd Generation Dana axles
Front differential typeOpen or Tru-Lok electronic locking (on Rubicon models)
Front axle ratios3.45, 4.10
Rear3rd Generation Dana axles
Rear differential typeOpen (Sport and Sahara) with available Trac-Lok anti-spin, Tru-Lok electronic locking (Rubicon)
Rear axle ratios3.45, 4.10
Electrical system+
Alternator (standard)160 amp
Battery600 CCA, maintenance free
Suspension+
FrontSolid axle, link coil, leading arms, track bar, coil springs, stabilizer bar
Front stabilizer barElectronic sway-bar disconnect system — standard, Rubicon
Front shock typeSport: Gas charged twin tube shock absorbers with full displacement Multi-Tuned Valve (MTV) technology; Sahara: High pressure gas charged monotube shock absorbers with MTV technology; Rubicon: High pressure gas charged monotube shock absorbers with MTV technology and hydraulic rebound stop
RearSolid axle, link coil, trailing arms, track bar, coil springs, stabilizer bar
Rear shock typeSport: Gas charged twin tube shock absorbers with full displacement MTV technology; Sahara: High pressure gas charged monotube shock absorbers with MTV technology; Rubicon: High pressure gas charged monotube shock absorbers with MTV technology and hydraulic rebound stop
Steering+
TypeElectro-hydraulic Power
Overall Ratio17.4:1 – 2-door, 15.6:1 – 4-door
Turning Diameter (curb-to-curb) (ft./m)34.5 – 2-door, 39.4 – 4-door
Steering Turns (lock-to-lock)3.6 – 2-door, 3.2 – 4-door
P/S pumpElectro-Hydraulic
Brakes+
TypePower-assisted, anti-lock braking system
AvailabilityStandard
Front rotor size and type12.9 x .94 (330 x 24) vented rotor – Sport; 12.9 x 1.1 (330 x 28) vented rotor – Sahara and Rubicon
Front caliper size and type1.88 (48) twin-piston floating caliper – Sport; 2 (51) twin-piston floating caliper – Sahara and Rubicon
Rear rotor size and type12.9 x .47 (328 x 12) solid rotor – Sport; 13.4 x .55 (342 x 14) solid rotor – Sahara and Rubicon
Rear caliper size and type1.77 (45) single-piston floating caliper – Sport; 1.88 (48) single-piston floating caliper – Sahara and Rubicon
Four-wheel anti-lock brakesStandard
Electronic stability controlStandard
All-speed traction controlStandard
Dimensions and capacities+
Wheelbase2-door 96.8 (2,460), 4-door 118.4 (3,008)
Overhang — Front29.2 (741.6)
Overhang — Rear40.8 (1,036.3)
Track — Front62.9 (1,598)
Track — Rear62.9 (1,598)
Overall Length (includes spare tire)166.8 (4,237) – 2-door, 188.4 (4,785) – 4-door
Overall Width73.8 (1,875)
Overall Height73.6 (1,868.4)
Liftover Height29.7 (756.4)
Cargo Width at Swing-Gate Opening41.1 (1,052)
Cargo Height at Swing-Gate Opening36 (942.3)
Load Floor Height30 (762.1)
Clearances+
245/75R17 — Standard on Sport255/70R18 — Standard on SaharaLT28570R17 — Standard on Rubicon
Approach Angle (degrees)41.441.844 (2-door); 43.9 (4-door)
Breakover Angle (degrees)25 (2-door); 20.3 (4-door)2127.8 (2-door); 22.6 (4-door)
Departure Angle (degrees)35.9 (2-door); 36.1 (4-door)36.137
Ground Clearance (inches)9.71010.8

Measurements are the same for 2-door and 4-door models unless a body style is given.

Curb weight+
2.0-liter (2- and 4-door)3.6-liter (2- and 4-door)
Wrangler Sport, automatic transmission (lbs./kg)4,010 (1,819) / 4,320 (1,960)3,955 (1,794) / 4,200 (1,905)
Wrangler Sport, manual transmission (lbs./kg)N/A3,970 (1,801) / 4,215 (1,912)
Wrangler Sahara, automatic transmission (lbs./kg)4,380 (1,987)4,345 (1,971)
Wrangler Sahara, manual transmission (lbs./kg)N/AN/A
Wrangler Rubicon, automatic transmission (lbs./kg)4,175 (1,894) / 4,485 (2,034)4,145 (1,880) / 4,455 (2,021)
Wrangler Rubicon, manual transmission (lbs./kg)N/AN/A

Weights differ by transmission as called out; where two weights appear in a cell they are as printed on the sheet (2-door / 4-door).

Accommodations+
Seating Capacity (front/rear)2/2 – 2-door, 2/3 – 4-door
SAE Total Interior Passenger Volume, (cu. ft. / cu. m)103.7 (2.94)
Front headroom40.7 (1,036) hardtop / 42.6 (1,083) soft top
Front legroom41.2 (1,038)
Front shoulder room55.7 (1,417)
Front hip room53.9 (1,370)
Front seat travel8.1 (206)
EPA Front Volume Index53.8 (1.52)
Rear headroom40.2 (1,023) hardtop, 41.7 (1,059) soft top
Rear legroom35.7 (904.2) – 2-door, 38.3 (974) – 4-door
Rear knee clearance61.6 (1,565.9)
Rear shoulder room57.7 (1,458) – 2-door, 55.7 (1,417) – 4-door
Rear hip room45 (1,143) – 2-door, 56.7 (1,440) – 4-door
EPA Rear Seat Volume Index (cu. ft. / cu. m)49.9 (1.40)
Liftover Height29.7 (756.4)
Maximum Cargo Width at Liftgate Opening47.9 (1,218.7)
Minimum Cargo Width at Liftgate Opening41.1 (1,052)
Maximum Cargo Height at Liftgate Opening36.0 (942.3)
Minimum Cargo Height at Liftgate Opening35.7 (907.8)
Distance between Wheelhouse Interior Trim45.0 (1143)
SAE Cargo Volume, rear seat folded72.4 cu. ft. (2.05)
SAE Cargo Volume, rear seat upright31.7 cu. ft. (0.89)
Total Passenger plus Cargo Volume, (cu. ft. / cu. m)150.4 cu. ft.
Wheels+
Standard (Sport)Standard (Sport S)Optional (Sport S)Standard (Sahara)Optional (Sahara)Standard (Rubicon)Optional (Rubicon)
Type and MaterialPainted steel, Low Gloss Black paintedFully painted cast-aluminum with High Gloss Tech SilverPainted and polished cast-aluminum with Low Gloss Granite CrystalPainted spokes with polished cast-aluminumPainted High Gloss Technical Gray with polished cast-aluminumPainted pocket with Mid-Gloss paint and polished cast-aluminumPainted pocket with Mid-Gloss paint and polished cast-aluminum
Size17 x 7.5 in.17 x 7.5 in.17 x 7.5 in.18 x 7.5 in.18 x 7.5 in.17 x 7.5 in.17 x 7.5 in.
Tires+
Standard (Sport)Standard (Sahara)Standard (Rubicon)
Size and TypeP245/75R17, on/off-road, black sidewallP255/70R18, on/off-road, OWLLT285/70R17C, on/off-road, black sidewall
Mfr. and ModelMichelin LTX MS2, Bridgestone Dueler HT 685, Bridgestone Dueler AT RH-S, Goodyear Wrangler Adventure ATBridgestone Dueler HT 685, Bridgestone Dueler AT RH-S, Goodyear Wrangler Adventure ATBF Goodrich KO2 All-Terrain
Revs per Mile (km)665 (413) – Michelin LTX MS2; 661 (411) – Bridgestone Dueler HT 685 & AT RH-S; 668 (415) – Goodyear Wrangler Adventure AT649 (403)645 (401)
Towing capacities: Wrangler Sport (4-door)+
Trans typeTransmissionAxle ratioPayloadBase wt.Base wt. frontBase wt. rearGAWR frontGAWR rearGCWRMax trailer
3.6-liter V-6 gasM6D478 6-speed manual3.4510004201222619742700300081173500
3.6-liter V-6 gasA8850RE 8-speed automatic3.4510004215224019742700300081173500
2.0-liter I-4 gasA8850RE 8-speed automatic3.4510004336229820382700300081173500

GCWR = base weight + maximum trailer weight + 150 lbs. for driver.

Towing capacities: Wrangler Sahara (4-door)+
Trans typeTransmissionAxle ratioPayloadBase wt.Base wt. frontBase wt. rearGAWR frontGAWR rearGCWRMax trailer
3.6-liter V-6 gasM6D478 6-speed manual3.4588043312289204227003000108363500
3.6-liter V-6 gasA8850RE 8-speed automatic3.4588043452303204227003000108363500
2.0-liter I-4 gasA8850RE 8-speed automatic3.4588043762319205627003000108363500

GCWR = base weight + maximum trailer weight + 150 lbs. for driver.

Towing capacities: Wrangler Rubicon (4-door)+
Trans typeTransmissionAxle ratioPayloadBase wt.Base wt. frontBase wt. rearGAWR frontGAWR rearGCWRMax trailer
3.6-liter V-6 gasM6D478 6-speed manual4.1089244392346209331003100110633500
3.6-liter V-6 gasA8850RE 8-speed automatic4.1089244532360209331003100110633500
2.0-liter I-4 gasA8850RE 8-speed automatic4.1089244842376210731003100110633500

GCWR = base weight + maximum trailer weight + 150 lbs. for driver.

Source: 2018 All-new Jeep Wrangler Specs (Stellantis media site).

2018 Jeep Wrangler maintenance schedule

The factory schedule for normal driving. Oil changes follow the oil-change indicator on most models; severe use (towing, dusty roads, lots of idling) shortens some intervals.

A dot means the service is due at that mileage. Engines: see schedule title.

Service20k30k40k50k60k70k80k90k100k110k120k130k140k150k
Additional Inspections
Inspect the CV/Universal joints.
Inspect front suspension, tie rod ends, and replace if necessary.
Inspect the front and rear axle fluid.
Inspect the brake linings, replace as necessary
Adjust parking brake on vehicles equipped with four wheel disc brakes.
Inspect transfer case fluid.
Additional Maintenance
Replace engine air cleaner filter.
Replace air conditioning/cabin air filter.
Replace spark plugs
Flush and replace the engine coolant at 10 years or 150,000 miles (240,000 km) whichever comes first.
Change automatic transmission fluid and filter if using your vehicle for any of the following: police, taxi, fleet, or frequent trailer towing.
Change the automatic transmission fluid and filter.
Change the manual transmission fluid if using your vehicle for any of the following: trailer towing, snow plowing, heavy loading, taxi, police, delivery service (commercial service), off-road, desert operation or more than 50% of your driving is at sustained high speeds during hot weather, above 90°F (32°C).
Change transfer case fluid if using your vehicle for any of the following: police, taxi, fleet, or frequent trailer towing.
Inspect and replace PCV valve if necessary.
Change front and rear axle fluid if using your vehicle for police, taxi, fleet, off-road or frequent trailer towing.

At Every Oil Change Interval As Indicated By Oil Change Indicator System

  • Change oil and filter
  • 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 automatic transmission fluid if equipped with dipstick
  • 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
  • Inspect all door latches for presence of grease, reapply if necessary.

2018 Jeep Wrangler fluids & capacities

Oil, coolant, transmission and axle fluids with their capacities and specifications, wheel torque and fuel requirements, from the owner's manual.

Fluid capacities

SystemApplies toUSMetric
Fuel tank (approximate)Two-door models18.6 gal70 L
Four-door models22.5 gal85 L
Engine oil with filter3.6L engine6 qt5.6 L
Cooling system3.6L engine10.5 qt9.9 L

Engine fluids

ComponentFluid / gradeStandardMopar product
Engine coolantOAT (organic additive technology) coolantMS.90032Mopar Antifreeze/Coolant 10 Year/150,000 Mile Formula (OAT)
Engine oilAPI-certified SAE 5W-20MS-6395—
Engine oil filterMopar oil filter or equivalent—Mopar Engine Oil Filter
Spark plugsMopar spark plugs—Mopar Spark Plugs

Chassis fluids & lubricants

ComponentFluid / gradeStandardMopar product
Automatic transmission (If equipped)ATF+4—Mopar ATF+4 Automatic Transmission Fluid
Manual transmission (If equipped)Manual transmission lubricantMS-9224Mopar Manual Transmission Lubricant
Transfer caseATF+4—Mopar ATF+4 Automatic Transmission Fluid
Axle differential (Front)SAE 80W-90, API GL-5—Mopar Gear & Axle Lubricant (SAE 80W-90)
Axle differential (Rear, 226 RBI (Model 44))SAE 80W-90, API GL-5; for trailer towing use SAE 75W-140 synthetic; Trac-Lok models require an additive—Mopar Gear & Axle Lubricant (SAE 80W-90); Mopar Synthetic Gear & Axle Lubricant (SAE 75W-140)
Brake master cylinderDOT 3, SAE J1703 (DOT 4 acceptable if DOT 3 unavailable)SAE J1703Mopar DOT 3 Brake Fluid
Power steering reservoirPower steering fluid +4 / ATF+4—Mopar Power Steering Fluid +4; Mopar ATF+4 Automatic Transmission Fluid

Fuel

EngineMinimumEthanol / biodiesel
3.6L engine87 octane Regular unleadedUp to 15% (E15)

Wheel lug nut torque

WheelsTorqueThreadSocket
Lug nuts/bolts100 ft-lb (135 N·m)1/2" x 2019 mm
  • Cooling system capacity includes the coolant recovery bottle filled to MAX.
  • Oil filler cap shows the correct SAE grade.
  • Check lug nut torque after 25 miles (40 km).

Source: Owner's manual (PDF). Always confirm with the manual for your exact vehicle.

2018 Jeep Wrangler owner's manuals & publications

The manufacturer's owner's manual, quick guides, radio manuals, supplements and warranty booklets for the 2018 model year.

2018 Jeep Wrangler questions

How much oil does the 2018 Jeep Wrangler take?

With a filter change: 3.6L engine, 6 qt / 5.6 L. Capacities are from the owner's manual; check the dipstick or oil-life display after filling.

What kind of oil does the 2018 Jeep Wrangler use?

Engine oil: API-certified SAE 5W-20 (MS-6395) and Engine oil filter: Mopar oil filter or equivalent.

When is the first scheduled maintenance on the 2018 Jeep Wrangler?

At 20,000 miles: inspect the cv/universal joints; inspect front suspension, tie rod ends, and replace if necessary; inspect the front and rear axle fluid; inspect the brake linings, replace as necessary; adjust parking brake on vehicles equipped with four wheel disc brakes; replace air conditioning/cabin air filter. Oil changes in between follow the oil-change indicator.

Where can I find the 2018 Jeep Wrangler owner's manual?

The manufacturer publishes it free on Mopar.com as a PDF (linked in the manuals section above), along with quick guides, radio manuals and the warranty booklet.

Specifications come from the manufacturer's spec comparison and its media-site specification sheets; maintenance schedules, fluids and publications come from Mopar's owner site and owner's manuals. Equipment and ratings vary by configuration; check the owner's manual or a dealer for a specific vehicle.