Yukon Gear High Performance Gear Set For Dana 44 JK Rear in a 5.13 Ratio
A JK on 37 inch tires with the factory gears is slow off the line, lives in the lower gears on the highway and has no crawl left on the trail. The Yukon Gear & Axle YG D44JK-513RUB is a 5.13 high-performance ring and pinion set for the rear Dana 44 under the 2007-2018 Jeep Wrangler JK. It is a new set with a 24-spline pinion and 10 ring gear bolt holes, made for owners running the biggest tires a JK usually carries.
The pinion takes torque from the rear driveshaft and drives the ring gear, which is bolted to the differential carrier. With 5.13 gears the driveshaft turns 5.13 times per axle turn, so the engine runs faster at a given speed and makes more torque at the wheels. On a JK with tall tires that brings the effective gearing back near where the factory set it with stock tires.
The JK rear Dana 44 is a standard-rotation axle. Yukon lists this set with an 8.89 in. ring gear diameter, and its ring gear is double drilled for both 7/16 in. and 1/2 in. ring gear bolts, so it can bolt to the carriers used in different JK rears. Use the bolt size your carrier takes.
Read the axle tag on the rear housing to confirm a Dana 44 and note the current ratio. Almost every JK has a Dana 44 rear, but fewer than a thousand early 2007 trucks were built with a Dana 35. If the reason you are shopping is noise rather than tire size, pull the cover, check the oil for metal or water, and read the contact pattern. Worn bearings alone can be handled with the JK Rubicon rear master overhaul kit without changing ratio. If 5.13 is more than you need for 35s, the Yukon JK rear 4.88 set is the next step down.
Yukon lists this set for the Dana 44 rear of 2007-2018 JK Rubicon and Unlimited Rubicon, plus JK Sahara, Unlimited Sahara, Sport and Sport S and the 70th and 75th Anniversary models in the listed years. The "RUB" in the part number does not limit it to Rubicons; the gears fit the JK rear Dana 44 in non-Rubicon trims too, but the bearings, pinion kit and carrier differ, so order the master kit that matches your trim. It does not fit the JK front axle, the TJ Dana 44 or the JL Dana 44. Send us your year, trim and VIN if you want a second check. Browse more axle hard parts in our hard parts collection.
| Brand | Yukon Gear & Axle |
| Part number | YG D44JK-513RUB |
| Fits | Yukon Gear High Performance Gear Set For Dana 44 JK Rear in a 5.13 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.
Yukon lists it for the rear Dana 44 in Rubicon, Sahara, Sport and Sport S JKs. The gears are the same, but the bearing kit and carrier differ by trim, so match the master overhaul kit to your trim.
5.13 is typically chosen for 37 inch tires, especially on the 3.8L or with an automatic. On 35s many owners pick 4.88. Run your tire height and engine through a gear ratio calculator before you order.
Yukon drills it for both 7/16 in. and 1/2 in. ring gear bolts so it can mount on the different carriers used in JK rears and on aftermarket lockers. Use the bolt size your carrier takes and torque to that size.
Confirm with your carrier maker. Some carriers have a ratio break where deeper gears need a different carrier or spacer. Check the factory locker or aftermarket locker spec for the 5.13 ratio before installing.
Rubicons need a 5.13 reverse-cut set for the front Dana 44. Sport and Sahara models need a 5.13 set for the front Dana 30. Both axles must have the same ratio.
