Yukon Gear 07-17 Jeep Wrangler Electric Locker For Dana 44 Diff w/ 30 Spline Axles - Front
The front locker in a JK Rubicon is the part owners notice only when it quits: the dash light blinks, the switch does nothing, or the front axle stays open on the exact rock ledge it was built for. The Yukon Gear & Axle electric locker, part number YP PCD44JK-30-F, is a replacement selectable locker for the Dana 44 front axle in 2007-2017 Jeep Wrangler JK Rubicon models with 30-spline front axle shafts.
Disengaged, the unit works like an open differential, so the front tires can turn at different speeds and the Jeep steers and drives normally on pavement. Energize it and an electrically actuated mechanism locks the side gears to the case, giving 100 percent lockup so both front tires turn together no matter which one has traction. Yukon builds it with a forged steel case and alloy internals, and it rides on carrier bearing journals of 1.9685 in. The Rubicon front is a reverse-rotation, high-pinion Dana 44, which is why a Dana 44 rear locker is not a substitute.
Start with the simple checks: the locker only engages in 4-Lo below walking speed, and the rear locks first on most JK switch logic. Chock the Jeep, lift both front tires, put the transfer case in 4-Lo and the transmission in neutral, then select the front locker and turn one front tire by hand. Locked, both tires turn the same direction; open, the other side counter-rotates. If the switch, fuse and connector at the axle check good and it still will not lock, the unit itself is usually the problem. Our electric locker not engaging guide covers the wiring checks in more depth, and the Dana 44 problems and rebuild cost guide covers the bearing and seal wear that often shows up at the same teardown.
Yukon lists this locker for the front Dana 44 of 2007-2017 Jeep Wrangler JK Rubicon models with 30-spline axle shafts. It does not fit the non-Rubicon JK front, which is a Dana 30, or the JK Rubicon rear, which is a 32-spline Dana 44. The JK Rubicon left the factory at 4.10; the common regear ratios of 4.56, 4.88 and 5.13 sit on the same side of the Dana 44 carrier break, but swapped or used Jeeps vary, so check the axle tag and send us your year, VIN and ratio if you are not sure. See our JK regear buyers guide for how the axles and ratios line up. Electric locker wiring varies between brands, so confirm with us how it connects on your Jeep before install.
| Brand | Yukon Gear & Axle |
| Part number | YP PCD44JK-30-F |
| Fits | Yukon Gear 07-17 Jeep Wrangler Electric Locker For Dana 44 Diff w/ 30 Spline Axles - Front |
| Vehicle fitment | Jeep Wrangler Electric (2007-2017) |
| Type | Differentials |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. Non-Rubicon JKs use a Dana 30 front axle. This locker is for the Rubicon Dana 44 front with 30-spline shafts.
No. The JK Rubicon rear Dana 44 uses 32-spline shafts and a standard-rotation gear set. This unit is the front, 30-spline version.
The factory JK Rubicon ratio is 4.10, and 4.56, 4.88 and 5.13 are all on the same side of the Dana 44 carrier break. Confirm your axle tag and ratio with us before ordering if the Jeep has been modified.
No. A selectable locker has no clutch packs. Standard 75W-90 GL-5 gear oil is what the axle needs.
The JK locks the front only in 4-Lo at low speed, and a bad connection, fuse or failed actuator can also cause it. Check the wiring and connector at the axle first; if they test good, the locker itself has usually failed.
Yes. The carrier is already out, and a JK Rubicon front master overhaul kit costs far less than tearing the axle down twice.
