Specs, fluids & service · 2007–2018
Jeep Wrangler JK (2-door) specs, fluids and service intervals
The numbers you need in the garage, on one page: spec sheet, capacities and service intervals, wheels and tires, and the parts to order. Sourced from owners, specialists and the factory; tags marked confirm in manual haven't been checked against a factory source yet.
Spec sheet
| CODE | JK (2-door) |
|---|---|
| PRODUCTION | Aug 2006 – Apr 27, 2018 (Toledo, Ohio) |
| MODEL YEARS | 2007–2018 |
| ENGINES (US) | 3.8 L EGH V6 (2007–11) · 3.6 L Pentastar V6 (2012–18) |
| OUTPUT | 202 hp / 237 lb-ft → 285 hp / 260 lb-ft |
| TRANSMISSIONS | NSG370 6-spd · 42RLE 4-spd · W5A580 5-spd |
| TRANSFER CASE | NV241 Command-Trac 2.72:1 · Rock-Trac 4:1 |
| WHEELBASE | 95.4 in |
| WIDTH | 73.7 in |
| APPROACH / DEPARTURE (Rubicon) | 44.3° / 40.4° |
| TOWING | 2,000 lb |
| FUEL TANK | 18.6 gal |
| WHEEL BOLT PATTERN | 5 x 5 in |
By year
| YEARS | PLATFORM | ENGINE | OUTPUT | NOTES |
|---|---|---|---|---|
| 2007–2010 | JK 2-door (X/Sport, Sahara, Rubicon) | 3.8 L EGH V6 | 202 hp / 237 lb-ft | NSG370 six-speed or 42RLE four-speed. Hill Start Assist from 2009; easier-folding soft top in 2010. |
| 2011 | JK 2-door | 3.8 L EGH V6 | 202 hp / 237 lb-ft | New interior: dash, steering-wheel controls, available heated leather. Last year of the 3.8 and 42RLE. |
| 2012–2018 | JK 2-door | 3.6 L Pentastar V6 | 285 hp / 260 lb-ft | W5A580 five-speed auto or NSG370. EPA 17/21 mpg (2012 2-door). Revised oil filter housing from 2014. |
| 2012–2013 | Pentastar early engines | 3.6 L Pentastar V6 | — | Some left cylinder heads failed (misfire codes); warranty extended to 10 years/150,000 miles. |
| 2007–2018 | Rubicon (incl. 10th Anniversary, Rubicon X, Hard Rock) | 3.8 then 3.6 | As above | Dana 44s front and rear, e-lockers, 4:1 Rock-Trac, 4.10 gears, sway-bar disconnect, LT255/75R17 BFG KM. |
| 2007–2018 (ex-US) | JK 2.8 CRD | VM Motori 2.8 L turbo-diesel I4 | 177 hp / 302 lb-ft, later 197 hp | Never sold in the US. |
Fluids, capacities & service intervals
Most JKs have been lifted, re-tired or wheeled, so baseline the drivetrain fluids and the front end first. On a 2012–18 Pentastar, look into the engine valley for oil-filter-housing leaks before you do anything else. Buy by engine and year: the filter, plugs, thermostat housing and coolant type all changed during the run.
| ITEM | SPEC / CAPACITY | INTERVAL | NOTES & PARTS |
|---|---|---|---|
| Engine oil & filter | 5W-20 meeting MS-6395 · 6 qt (3.8 and 3.6) | Jeep: 8,000 mi or 6 months on the Pentastar, never over 10,000; sooner for severe use | The Pentastar's cartridge filter lives in the top-mounted housing (24 mm cap; don't yank the filter or you can break the pressure-relief valve). The filter changed for 2014.OMIX 17436.42 air, oil and cabin filter kit, 2014–18 JK 3.6 · Quadratec ↗Mopar 68191350AA oil filter cap, 2014–18 JK 3.6 · Quadratec ↗ |
| Oil filter housing inspection (2012–18) | Plastic housing/cooler in the engine valley | Now, and with a flashlight at every oil change | Oil or coolant pooled under the plenum means it's time for the aluminum upgrade.Mishimoto aluminum oil filter housing kit, 2014–17 JK · ExtremeTerrain ↗OMIX 17436.52 oil filter housing assembly, 2012–13 JK · Quadratec ↗ |
| Engine air & cabin filters | Factory airbox element and cabin filter | Inspect at every oil change; replace when dirty | Dusty trail use clogs the air filter fast.JK cabin air filters · Quadratec ↗ |
| Spark plugs | 3.8: Champion RE14PLP5, 0.050 in, 12 lb-ft per ExtremeTerrain confirm in manual · 3.6: Champion RER8ZWYCB4, 0.043 in, 13 lb-ft | ExtremeTerrain quotes Chrysler's 102,000 mi confirm in manual; inspect at 60,000 on modified or trail trucks | The 3.8 uses plug wires; the 3.6 is coil-on-plug.Mopar SP149125AF spark plug, 3.6 · Quadratec ↗Crown S2RE14PLP5 spark plug, 3.8 · Quadratec ↗ |
| Coolant & thermostat | 3.8 and 2012 3.6: HOAT, ≈13 qt · 2013-on 3.6: OAT 10-yr/150k, 10.5 qt | Flush now if there's no record, then per the coolant's life | Don't mix HOAT and OAT; check which one is in the tank before topping up.Mopar 68163849AB pre-diluted OAT coolant, 2013-on · Quadratec ↗Crown 68210220AA thermostat, 2007–11 JK 3.8 · Quadratec ↗OMIX 17118.07 thermostat housing, 2012–18 JK 3.6 · Quadratec ↗ |
| Automatic transmission | ATF+4 · 42RLE: 4 qt service fill · W5A580 (NAG1): 5.3 qt service fill | Drain and refill (with a filter) now if there's no record | A service fill only changes part of the fluid; do it twice rather than flushing.Mopar 52108325AA transmission filter, 2012–18 JK · Quadratec ↗ATF+4 (search) · Quadratec ↗ |
| Manual transmission (NSG370) | Mopar Manual Transmission Lubricant · 1.6 qt | Change now if there's no record | The clutch hydraulics use DOT 3 brake fluid; check the clutch master level.Mopar manual transmission lubricant (search) · Quadratec ↗ |
| Transfer case (NV241) | ATF+4 · 2.1 qt | Change now | Same fluid for Command-Trac and Rock-Trac.ATF+4 (search) · Quadratec ↗ |
| Front & rear differentials | 80W-90 (75W-140 for towing) · Dana 30: 2.1 pt · Dana 44 front: 2.7 pt · Dana 44 rear: 4.75 pt · Trac-Lok: add 4 oz limited-slip additive | Now, and every 15,000 mi with heavy use or after deep water (ExtremeTerrain) | You can check JK diff levels without pulling the cover.Gear oil 80W-90 (search) · Quadratec ↗Limited slip additive (search) · Quadratec ↗ |
| Driveshaft U-joints | 1350-series joints | Inspect now; grease if greasable | Lifted JKs chew through rear driveshaft joints. Check for play by hand.Yukon YUJ7166 1350 U-joint, 2007–18 JK · Quadratec ↗Dana Spicer SPL30-1350XC driveshaft U-joint, 2012-on JK · Quadratec ↗ |
| Front-end inspection | Track bar, tie rods, drag link, ball joints, unit bearings | Now, and after every lift install or hard trail day | Re-torque the hardware and align. This is your death-wobble insurance.Dana Spicer 10073372 ball joint kit · Quadratec ↗JK tie-rod ends · Quadratec ↗ |
| Power steering fluid | Power Steering Fluid +4 (ATF+4 acceptable) | Check level and condition now | Big tires work the steering box and pump hard.Mopar power steering fluid (search) · Quadratec ↗ |
| Brake fluid | DOT 3 | Flush now, then every 2–3 years confirm in manual | The same reservoir type also feeds the clutch on manual trucks.Mopar 4318080AD DOT 3 brake fluid · Quadratec ↗ |
Capability
| Towing | 2,000 lb (907 kg) |
|---|---|
| Payload | 1,000 lb (454 kg) 2007 spec |
| Fuel tank | 18.6 gal (70 L) |
| Ground clearance | 8.8–10.2 in (224–259 mm) X to Rubicon, 2007 spec |
| Approach / departure / breakover | 44.3° / 40.4° / 25.4° Rubicon on 32 in tires |
| Fuel economy | EPA 17 city / 21 hwy 2012 two-door, 3.6 Pentastar |
| Curb weight | 3,760–4,104 lb (1,706–1,862 kg) 2007 X to Rubicon |
| Wheelbase | 95.4 in (2,423 mm) |
Wheels & tires
| Factory tire | 225/75R16 or 245/75R16 (X/Sport) · 255/75R17 (Sport S, Sahara and most special editions) · 255/70R18 (Sahara option, 70th Anniversary) · LT255/75R17 BFGoodrich Mud-Terrain (Rubicon) |
|---|---|
| Bolt pattern | 5x127 (5x5") |
| Center bore | 71.5 mm |
| Lug thread | 1/2"-20 (60° cone seat) |
| Biggest tire · Stock | 33 in (e.g. 285/70R17) |
| Biggest tire · 2.5 in | 35x12.50 or 285/75R17 |
| Biggest tire · 3.5 in | 37 in |
Open the Jeep Wrangler JK (2-door) in the tire fitment tool →
Common Jeep Wrangler JK (2-door) repairs
- Replace the Pentastar oil filter housing (2012–18)DIFFICULTY 3 / 5
- Cure death wobble: track bar, tie rods and steeringDIFFICULTY 2 / 5
- Press in new ball jointsDIFFICULTY 4 / 5
- Replace a front unit bearingDIFFICULTY 2 / 5
- Fix a ticking exhaust manifold (broken bolts)DIFFICULTY 3 / 5
- Replace the clockspringDIFFICULTY 2 / 5
- Change the spark plugs (and don't over-torque the Pentastar)DIFFICULTY 2 / 5
- Gusset or truss a bent front axleDIFFICULTY 4 / 5
Always confirm torque figures, fluids and capacities against the factory service manual for your VIN. See the disclaimer; some parts links are affiliate links.