Yukon Gear High Performance Gear Set For Dana 30 JK Short Reverse Pinion / 4.11
The Yukon Gear & Axle YG D30SR-411JK is a 4.11 ring and pinion for the front Dana 30 under non-Rubicon Jeep Wrangler JK and JK Unlimited models built from 2007 to 2018. Owners usually come looking for it after a mild lift and 33 inch tires leave the Jeep slow off the line and hunting for gears on the highway, or after the front differential starts to whine in four-wheel drive. Yukon lists this set as reverse rotation with a 7.33 in. ring gear, a 24-spline short pinion and 10 ring gear bolts.
The ring and pinion is the last torque multiplier between the transfer case and the front tires. With 4.11 gears, the front driveshaft turns 4.11 times for each turn of the wheels, compared with 3.21 or 3.73 on most stock JKs. The JK front axle is a high-pinion, reverse-rotation design, so its teeth are cut differently from a standard-rotation Dana 30 and the drive side of the gear is the side a normal axle would use on coast. That is why a TJ, YJ or XJ Dana 30 set cannot be swapped in. Taller tires effectively make the gearing taller: as an example, a JK on 3.21 gears that moves from about 31.5 in. tires to 33s drives as if it had roughly 3.06 gears (3.21 x 31.5 / 33). A 4.11 set more than wins that back, which is why it suits 33s and lighter builds better than the deeper 4.56 or 4.88 options.
First make sure this is the right axle: Rubicons use a Dana 44 front, so this set is only for X, Sport, Sport S, Sahara and Anniversary models. Our JK regear kit buyer's guide explains which parts each axle needs. Next, settle the rear ratio, because the front and rear must match exactly. Yukon's 4.11 is not the same tooth count as a Dana factory 4.10, so if your rear already has 4.10 gears, order a 4.10 front instead; if you are doing both axles, pair this with a Yukon 4.11 JK Dana 44 rear set. Finally, check the carrier. The JK Dana 30 carrier break sits between 3.54 and 3.73, so a Jeep that left the factory with 3.21 gears needs the JK Dana 30 3.73-and-up carrier or a locker in that series. Our carrier break guide covers how to tell which you have.
Yukon's fitment rows for YG D30SR-411JK cover the JK non-Rubicon Dana 30 front: Wrangler X and Unlimited X 2007-2010, Sahara 2007-2017 and Unlimited Sahara 2007-2018, Sport and Unlimited Sport 2010-2018, Sport S and Unlimited Sport S, the 2011 70th Anniversary and the 2016 75th Anniversary, plus 2018 JK Sport and Sahara. It does not fit a JK Rubicon, a 2018-and-later JL, or any TJ, YJ or XJ. Axles get swapped, so check the tag on the housing or send us your year, trim and VIN to confirm. If you are running 35s, the 4.56 JK front set or the 4.88 JK front set is the better match. See every axle part in our hard parts category.
Do not reuse the old bearings with new gears. The Yukon JK Dana 30 master overhaul kit supplies the bearings, races, shims, seals and crush sleeve, or use the JK front crush sleeve eliminator for an easier preload setting. Set pinion depth first, then pinion preload, then carrier backlash, and read the marking-compound pattern with the reverse-rotation loaded side in mind. Refill with the front axle gear oil your owner's manual specifies, keep the first few hundred miles easy with no towing or trail use, then drain and refill. Our ring and pinion break-in procedure lays out the steps. Recalibrate the computer for the new ratio and tire size so the speedometer, transmission shift schedule and stability control work correctly.
| Brand | Yukon Gear & Axle |
| Part number | YG D30SR-411JK |
| Fits | Yukon Gear High Performance Gear Set For Dana 30 JK Short Reverse Pinion / 4.11 |
| Type | Final Drive Gears |
| 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.
We do not recommend it. A 4.11 and a 4.10 use different tooth counts, and the front and rear ratios must match exactly in four-wheel drive. Match the front to the rear, or regear both axles with 4.11 sets.
For most JKs on 33s it restores the acceleration lost to the bigger tires and then some. Heavier Unlimiteds on 35s usually go to 4.56 or 4.88.
No. The Rubicon has a Dana 44 front axle. This set is for the Dana 30 front on non-Rubicon JKs such as the X, Sport, Sport S and Sahara.
Only if your Jeep came with 3.21 gears. The JK Dana 30 carrier break falls between 3.54 and 3.73, and 4.11 uses the 3.73-and-up carrier.
A JK Dana 30 master overhaul kit with new bearings, races, shims and seals, plus gear oil. Many installers also add a crush sleeve eliminator.
