Yukon Gear Ring & Pinion Gear Set For Dana 44 in Jeep JL Rubicon 186mm in 4.11 Ratio
The 4.11 ratio is the moderate step in a Jeep Wrangler JL regear: enough to wake up a Sport or Sahara that moved to slightly taller tires, without the busy highway rpm of 4.88. It is also the right part when the front gears are damaged and you want a ratio close to what many trail builds already run. The Yukon YG D30JL-411R is a new 4.11 ring and pinion for the JL Dana 30 front with the 186mm ring gear, known as the M186. Please note that our listing title mentions a Dana 44 and the Rubicon; the Yukon part number and fitment are for the non-Rubicon Dana 30 / 186mm front, not the Rubicon's Dana 44 M210 front.
On the JL, the front pinion faces rearward to meet the front driveshaft from the transfer case, which is opposite to the rear axle. Yukon makes this set reverse rotation with a short pinion so forward driving loads the drive face of each tooth, and its fitment notes read Dana 30 / M186, reverse rotation, short pinion, 4.11 ratio. A 4.11 front ring gear turns once for every 4.11 turns of the pinion. Compared with a lower numeric factory ratio, that multiplies torque at the tire and lets the engine stay closer to its useful rpm range when the tire diameter grows by an inch or two. Because 4.11 is a smaller jump than 4.56 or 4.88, the Jeep keeps calmer cruising rpm, which suits daily drivers and highway commuters.
Make sure your Jeep actually has the Dana 30 M186 front. Rubicon models use a Dana 44 front, and the Dana 30 vs Dana 44 comparison shows how to tell them apart from under the vehicle. Then confirm your present ratio using the guide to finding your axle ratio and code, and run your new tire height through the tire size regear guide to see whether 4.11 lands where you want it. If you have bigger tires planned later, it is usually cheaper to choose the final ratio now, such as the 4.88 version of this gear set, than to regear twice. For noise complaints, work through the Dana 30 front axle problems guide before ordering gears.
Yukon lists YG D30JL-411R for the 2018-2019 Jeep Wrangler JL 4WD with the Dana 30 / 186mm front axle in Sport, Sport S, Unlimited Sport, Unlimited Sport S and Unlimited Sahara trims. Newer non-Rubicon JLs built with the same 186mm Dana 30 front are the same axle family, but read the axle tag to be sure, or send us your year and VIN and we will confirm. This set does not fit a Rubicon Dana 44 front, a JK Dana 30 or any rear axle. Your rear axle, either the Dana 35 or the Dana 44 depending on how the Jeep was built, must be regeared to exactly 4.11 as well. More gears and setup parts are listed under hard parts.
Use new bearings and seals with new gears; the Spicer 10040313 JL Dana 30 front overhaul kit is built for this axle. The gears come without a carrier, so confirm your existing case accepts the 4.11 ring gear, and replace a worn case with the JL Dana 30 differential case kit if needed. Dana's JL front Dana 30 spec sheet calls for .005-.008 in. backlash, at least 160 ft-lb on the pinion nut and roughly 0.90 qt of 75W-140, and Yukon's setup chart lists 70 ft-lb ring gear bolts and 70 ft-lb bearing caps for this axle. Confirm the tooth contact pattern with the pattern and backlash guide, keep the first 500 miles gentle with no towing, and change the gear oil at 500 miles as the gear break-in procedure describes.
| Brand | Yukon Gear & Axle |
| Part number | YG D30JL-411R |
| Fits | Yukon Gear Ring & Pinion Gear Set For Dana 44 in Jeep JL Rubicon 186mm in 4.11 Ratio |
| 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.
No. The listing title says Dana 44 and Rubicon, but YG D30JL-411R is the Dana 30 with a 186mm ring gear used on Sport, Sport S and Sahara JLs. The Rubicon front is a Dana 44 M210 and needs its own gears.
4.11 suits a mild tire increase or a Jeep that spends most of its time on the highway, where a lower cruising rpm matters. Larger tire jumps usually call for 4.56 or 4.88. Use your tire height and current ratio to decide.
No. The front and rear axles must have the same ratio or the drivetrain will bind in 4WD. Order 4.11 gears for your rear axle, Dana 35 or Dana 44, at the same time.
Dana's JL front Dana 30 spec sheet lists 75W-140 at about 0.90 qt. Change it after the first 500 miles to flush out break-in wear material.
No, it is the ring and pinion only. Pair it with a JL Dana 30 front master overhaul kit for the pinion and carrier bearings, shims, seals and pinion nut.
