Yukon Gear High Performance Gear Set For Dana 44 JK Rear in a 4.56 Ratio

Yukon Gear High Performance Ring and Pinion Gear Set for Dana 44 JK Rear in 4.56 Ratio

Jeep Wrangler JK owners demanding the best available drivetrain upgrade will appreciate the YG D44JK-456RUB from Yukon Gear, a precision ring and pinion set built specifically for the Dana 44 rear differential in Jeep JK applications. The YG D44JK-456RUB features a 4.56 ratio, providing the torque multiplication needed when running larger tires on the JK platform. Yukon Gear engineers designed the YG D44JK-456RUB using high-grade steel with advanced heat treatment and precision tooth geometry, ensuring quiet operation and long-term reliability on the trail or the street.

Features and Benefits

• High-grade steel with advanced heat treatment for exceptional durability on the trail
• 4.56 ratio engineered for Jeep JK builds running 35 to 37 inch tires
• Precision tooth profile for reduced gear noise and lower operating temperatures
• Designed specifically for the Dana 44 rear differential in Jeep JK applications
• Compatible with Jeep Rubicon locking differential and aftermarket locker upgrades
• Meets or exceeds OEM tolerances for reliable, smooth operation
• Backed by Yukon Gear Y.E.S. extended service protection plan
• A popular companion to Yukon DuraGrip or Grizzly locker installations

Vehicle Fitment

Product Specifications

What Is Included

• One ring gear
• One pinion gear
• Installation instruction sheet

Frequently Asked Questions

What Jeep differentials does YG D44JK-456RUB fit?
This gear set fits the Dana 44 rear differential found in 2007 through 2018 Jeep Wrangler JK models, including Rubicon, Sahara, Sport, and Unlimited trims.

Is 4.56 the right ratio for my Jeep JK?
A 4.56 ratio is ideal for Jeep JK builds running 35 to 37 inch tires. It restores factory-like acceleration, throttle response, and transfer case high-range drivability.

Do I need a complete install kit with YG D44JK-456RUB?
Yes. A differential installation kit containing bearings, seals, and shims is required for a complete build and must be purchased separately.

Does the Magnuson-Moss Warranty Act protect my Jeep warranty?
Under the Magnuson-Moss Warranty Act, a dealer cannot void your vehicle warranty solely because an aftermarket part was installed. The dealer must show that the specific part caused the actual failure.

Can I use YG D44JK-456RUB with a Yukon DuraGrip or Grizzly locker?
Yes. This ring and pinion set is designed to be compatible with the Yukon Grizzly locker, DuraGrip limited slip, and other aftermarket differential carriers for the Dana 44 JK platform.

How does the Dana 44 JK differ from earlier Dana 44 differentials?
The Dana 44 JK rear uses a reverse-cut ring gear and a 24-spline pinion shaft, so it requires a gear set specifically designed for the JK application like YG D44JK-456RUB.

What gear oil should I use in my Jeep JK Dana 44 rear differential?
Use a 75W-90 or 75W-140 full synthetic gear oil. If the differential has a limited slip or locker, check the manufacturer's recommendation for friction modifier.

Is the YG D44JK-456RUB covered by a warranty?
Yes. Yukon Gear offers the Y.E.S. no-questions-asked warranty on ring and pinion sets, covering defects in materials and workmanship with transferable coverage.

Installation Instructions

1. Drain differential fluid and remove axle shafts and differential cover.
2. Mark bearing caps and remove the carrier from the housing.
3. Remove the old ring gear from the carrier and clean the carrier flange.
4. Install the new ring gear from YG D44JK-456RUB and torque to specification in a cross pattern.
5. Remove old pinion, crush sleeve or solid spacer, and pinion bearings.
6. Press new pinion bearings onto the shaft and into the housing.
7. Set pinion depth with appropriate shims using a dial indicator setup.
8. Achieve correct pinion bearing preload with an inch-pound torque wrench.
9. Install carrier assembly and set backlash to the specified range.
10. Verify gear contact pattern using gear marking compound and adjust as necessary.
11. Reinstall the differential cover with a new gasket or RTV and refill with 75W-140 gear oil.
12. Break in gears over the first 500 miles by avoiding heavy towing or aggressive off-road driving.

Prop 65 Warning: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.