Yukon Gear High Performance Replacement Gear Set For Dana 30 Reverse Rotation in a 4.56 Ratio

Yukon Gear YG D30R-456R High Performance Ring and Pinion for Dana 30 Reverse Rotation in 4.56 Ratio

Jeep XJ Cherokee and YJ Wrangler owners building for larger tires and improved trail performance will find the YG D30R-456R from Yukon Gear to be a direct-fit solution for the Dana 30 reverse-rotation front differential. The YG D30R-456R delivers a 4.56 ratio for the Dana Spicer 30 high-pinion front axle used in 1984 through 2001 Jeep Cherokee XJ, Wrangler YJ, Comanche MJ, and Grand Wagoneer SJ models. Yukon Gear engineers the YG D30R-456R from high-grade steel with advanced heat treating and precision tooth geometry, providing the torque multiplication needed to restore drivability after a tire upgrade. The Dana 30 reverse-rotation design means the pinion enters from the top of the differential housing, and the YG D30R-456R is specifically engineered for this high-pinion configuration with its 26-spline pinion shaft.

Features and Benefits

• High-grade steel with precision heat treating for durability in off-road and street use
• 4.56 ratio designed for Jeep XJ and YJ builds running 31 to 35 inch tires
• Precision reverse-rotation gear tooth profile for the high-pinion Dana 30 axle
• 26-spline pinion shaft as specified for the Dana 30 reverse-rotation application
• 7.2 inch ring gear diameter with 10 ring gear bolts
• OEM-spec fitment for direct replacement in all listed Jeep applications
• Backed by Yukon Gear Y.E.S. extended service protection plan option
• Must be paired with matching rear gear ratio for correct 4WD operation

Vehicle Fitment

Product Specifications

What Is Included

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

Frequently Asked Questions

What is a Dana 30 reverse-rotation differential?
The Dana 30 reverse-rotation, also called the high-pinion Dana 30, has the pinion shaft entering from the top of the ring gear. This design provides improved ground clearance and was used as the front axle in 1984 through 2001 Jeep Cherokee XJ, Wrangler YJ, Comanche MJ, and Grand Wagoneer SJ models.

What vehicles does YG D30R-456R fit?
This gear set fits the Dana 30 reverse-rotation front differential in 1984 to 2001 Jeep Cherokee XJ, 1987 to 1995 Jeep Wrangler YJ, 1986 to 1992 Jeep Comanche MJ, and 1984 to 1993 Jeep Grand Wagoneer SJ.

Is 4.56 the correct ratio to match with 33 or 35 inch tires on an XJ or YJ?
Yes. A 4.56 ratio restores effective acceleration and fuel economy in Jeep XJ and YJ builds running 33 to 35 inch tires over the factory ratio. It pairs well with 4.56 rear gears for matched 4WD performance.

Does installing YG D30R-456R affect my vehicle warranty?
Under the Magnuson-Moss Warranty Act, a dealer or manufacturer cannot void your vehicle warranty simply because an aftermarket part was installed. The dealer must prove that the specific part caused the specific failure being claimed.

Do I need an install kit with YG D30R-456R?
Yes. A Dana 30 master installation kit with new pinion and carrier bearings, seals, shims, and a crush sleeve is required for correct gear setup and preload adjustment.

Can YG D30R-456R be used with an ARB locker or Detroit Truetrac?
Yes. The ring and pinion set installs separately from the carrier. The YG D30R-456R is compatible with most aftermarket carriers and lockers designed for the high-pinion Dana 30 axle.

What gear oil should be used in the Dana 30 after installing YG D30R-456R?
Use 75W-90 or 75W-140 full synthetic gear oil. If an air locker or limited-slip differential is installed, confirm the specific fluid recommendation from the locker manufacturer before filling.

What is the break-in procedure for YG D30R-456R?
Yukon Gear recommends avoiding heavy loads or aggressive off-road use for the first 500 miles after gear installation. Change the differential fluid at the end of the break-in to remove any fine metallic particles generated during initial gear seating.

Installation Instructions

1. Drain differential fluid and remove the axle shafts and differential cover.
2. Mark bearing caps, then remove the carrier assembly from the housing.
3. Press off the old ring gear and clean the carrier flange surface completely.
4. Install the new ring gear from YG D30R-456R and torque bolts in a cross pattern to specification.
5. Remove the old pinion, crush sleeve, and pinion bearings from the housing.
6. Press new pinion bearings into the housing and onto the shaft using the correct installation tools.
7. Set pinion depth using shims and a dial indicator per the Yukon instruction sheet specifications.
8. Achieve the specified pinion bearing preload with an inch-pound torque wrench and a new crush sleeve.
9. Reinstall the carrier with correct side bearing shim stack to achieve proper backlash.
10. Verify gear contact pattern using gear marking compound and adjust until correct.
11. Install the cover with a new gasket or RTV and fill with the correct synthetic gear oil.
12. Break in the gears over 500 miles before resuming towing or trail use, then perform a fluid change.

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.