Yukon Jeep JK Non-Rubicon Complete Regear Kit - Dana 30 / Dana 44
YGK055
The Yukon Jeep JK Non-Rubicon Gear & Install Kit takes the guesswork out of regearing your Jeep Wrangler JK by combining matched front and rear ring and pinion gear sets with the master overhaul kits needed for installation. Designed for 2007–2018 Jeep JK Non-Rubicon models equipped with a Dana 30 front axle and Dana 44 rear axle, this complete package helps restore lost pulling power after larger tire upgrades while improving throttle response, low-speed control, and overall drivetrain performance.
Whether you're running larger tires, adding armor, or building a more capable trail Jeep, the right axle gearing makes a noticeable difference. This Yukon package includes front and rear gears in matching ratios along with bearings, races, seals, shims, and setup components supplied in the master overhaul kits. Available in 4.11, 4.56, 4.88, and 5.13 ratios, it's a practical way to get both axles geared correctly without sourcing every component separately. If your JK currently has 3.21 gears, plan on replacing the front differential carrier when moving to these deeper ratios.
Includes:
- (1) Dana 30 Front Ring & Pinion Gear Set
- (1) Dana 44 Rear Ring & Pinion Gear Set
- (1) Dana 30 Front Master Overhaul Kit
- (1) Dana 44 Rear Master Overhaul Kit
- Matching Front & Rear Gear Ratios
- Bearings, Races, Seals, Shims & Setup Components Supplied with the Master Overhaul Kits
Available Gear Ratios: 4.11, 4.56, 4.88, 5.13
Important: This kit is designed for Jeep JK Non-Rubicon models with a Dana 30 front axle and Dana 44 rear axle. Jeeps currently equipped with 3.21 gears require a compatible front differential carrier when upgrading to the listed ratios. The replacement carrier is not listed as included. Verify your installed axles, current gear ratio, and carrier configuration before ordering.
Specifications
| Manufacturer | Yukon Gear & Axle |
|---|---|
| Part Numbers | YGK055 / YGK012 / YGK013 / YGK014 |
| Product Type | Complete Front & Rear Gear and Install Kit |
| Vehicle Platform | Jeep Wrangler JK Non-Rubicon |
| Model Years | 2007–2018 |
| Front Axle Platform | Dana 30 |
| Rear Axle Platform | Dana 44 |
| Front Gear Configuration | Reverse Rotation / JK Dana 30 |
| Rear Gear Configuration | Standard Rotation / JK Dana 44 |
| Available Gear Ratios | 4.11 / 4.56 / 4.88 / 5.13 |
| Front Ring Gear Diameter | 7.12" |
| Rear Ring Gear Diameter | 8.50" |
| Front Ring & Pinion | Included |
| Rear Ring & Pinion | Included |
| Front Master Overhaul Kit | Included |
| Rear Master Overhaul Kit | Included |
| Carrier Compatibility | Verify Existing Carrier Break |
| 3.21 Factory Gear Applications | New Front Carrier Required |
| Installation Type | Complete Front & Rear Differential Regear |
| Primary Application | Jeep JK Tire Size Upgrades, Trail Performance & Drivetrain Regearing |
| Quantity | Complete Front & Rear Package |
Available Gear Ratios & Part Numbers:
| Gear Ratio | Yukon Part Number | Application |
|---|---|---|
| 4.11 | YGK055 | Dana 30 Front / Dana 44 Rear |
| 4.56 | YGK012 | Dana 30 Front / Dana 44 Rear |
| 4.88 | YGK013 | Dana 30 Front / Dana 44 Rear |
| 5.13 | YGK014 | Dana 30 Front / Dana 44 Rear |
Fitment
Designed for 2007–2018 Jeep Wrangler JK Non-Rubicon models equipped with the factory Dana 30 front differential and Dana 44 rear differential. Verify the installed axle configuration before ordering, especially on modified or axle-swapped vehicles.
| Make | Model | Year Range | Axle Application |
|---|---|---|---|
| Jeep | Wrangler JK Sahara | 2007–2018 | Dana 30 Front / Dana 44 Rear |
| Jeep | Wrangler JK Sport | 2010–2018 | Dana 30 Front / Dana 44 Rear |
| Jeep | Wrangler JK Sport S | 2016–2018 | Dana 30 Front / Dana 44 Rear |
| Jeep | Wrangler JK X | 2007–2011 | Dana 30 Front / Dana 44 Rear |
| Jeep | Wrangler JK X-S | 2009 | Dana 30 Front / Dana 44 Rear |
| Jeep | Wrangler JK Unlimited | 2012 | Dana 30 Front / Dana 44 Rear |
| Jeep | Wrangler JK Unlimited Sahara | 2007–2018 | Dana 30 Front / Dana 44 Rear |
| Jeep | Wrangler JK Unlimited Sport | 2010–2018 | Dana 30 Front / Dana 44 Rear |
| Jeep | Wrangler JK Unlimited Sport S | 2016–2018 | Dana 30 Front / Dana 44 Rear |
| Jeep | Wrangler JK Unlimited X | 2007–2011 | Dana 30 Front / Dana 44 Rear |
Fitment Notes:
- Fits compatible Jeep Wrangler JK Non-Rubicon models with Dana 30 front and Dana 44 rear axles
- Available in matching 4.11, 4.56, 4.88, and 5.13 front and rear gear ratios
- Not designed for factory JK Rubicon models with Dana 44 front axles
- Not intended for Jeep JL Wrangler axle configurations
- Verify current axle ratios and differential carrier compatibility before ordering
- Factory 3.21 front gear applications require a compatible replacement front carrier when upgrading to the listed ratios
- Front and rear axle gear ratios must match before operating in four-wheel drive
- Professional differential setup is recommended
Carrier Break Warning: If your JK currently has 3.21 factory gearing, the existing Dana 30 front carrier is not compatible with the deeper standard gear configurations in this package. A compatible replacement front differential carrier is required and is not included in the gear and install kit.
FAQ
What comes in the Yukon Jeep JK Non-Rubicon regear kit?
This package includes matching front and rear ring and pinion gear sets along with a master overhaul kit for each axle. The front gears are designed for the JK Dana 30, while the rear gears are designed for the JK Dana 44. The overhaul kits provide the bearings, races, seals, shims, and related setup components needed for differential installation.
What gear ratio should I choose for my Jeep JK?
The right ratio depends on tire size, engine, transmission, vehicle weight, and how you use your Jeep. Numerically higher ratios provide additional torque multiplication, helping offset larger tires and improve low-speed control.
| Gear Ratio | Common Applications |
|---|---|
| 4.11 | Daily driving, mild tire upgrades, and mixed street/trail use |
| 4.56 | 33"–35" tires, trail riding, and improved pulling power |
| 4.88 | 35" tires, added vehicle weight, and more trail-focused builds |
| 5.13 | 35"–37" tires, rock crawling, and low-speed off-road performance |
Builder Note: These are general starting points rather than fixed tire-size recommendations. Transmission gearing, engine performance, highway RPM, and intended use should all be considered before selecting a ratio.
Do I need a new front carrier if my Jeep currently has 3.21 gears?
Yes. When upgrading a factory 3.21-geared JK Dana 30 to the standard deeper ratios offered in this package, a compatible front differential carrier is required. The carrier is not included in the gear and install kit, so plan for that additional component before starting the regear.
Will this kit fit a Jeep JK Rubicon?
No. Factory JK Rubicon models use a Dana 44 front axle, while this package is designed for Non-Rubicon models with a Dana 30 front axle and Dana 44 rear axle. Rubicon applications require a different front gear and installation package.
Does this kit include both front and rear differential gears?
Yes. Each kit includes matching front and rear ring and pinion gear sets. Both axles are regeared to the same ratio so the four-wheel-drive system can operate correctly.
Does the kit include bearings, seals, and installation components?
Yes. The included front and rear master overhaul kits supply the bearings, races, seals, shims, and related differential setup components needed for the regear. Additional parts may be required depending on the condition of the existing axles and carrier compatibility.
Will regearing help my Jeep after installing larger tires?
Yes. Larger tires effectively raise the overall gearing, which can make a Jeep feel sluggish and cause the transmission to work harder. Installing numerically higher axle ratios helps restore torque multiplication, improve throttle response, and bring the drivetrain back into a more useful operating range.
Can I install this regear kit myself?
Ring and pinion installation requires specialized tools and experience setting pinion depth, bearing preload, backlash, and gear tooth contact patterns. Incorrect setup can cause gear noise, premature wear, or failure. We recommend professional installation unless you have experience rebuilding differentials.
Can I regear only the front or rear axle?
Both axle ratios must match before operating the vehicle in four-wheel drive. This package includes matching front and rear gears so both differentials can be upgraded together.