Yukon Gear High Performance Replacement Gear Set For Dana 30 Reverse Rotation in a 5.13 Ratio

Yukon Gear YG D30R-513R High Performance Ring and Pinion for Dana 30 Reverse Rotation in 5.13 Ratio

Serious Jeep XJ and YJ off-road builders running 35 inch tires or larger who need maximum crawl ratio from the front axle will find the YG D30R-513R from Yukon Gear to be the steepest available ratio for the Dana 30 reverse-rotation high-pinion front differential. The YG D30R-513R delivers a 5.13 ratio engineered 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-513R from high-grade steel with advanced heat treating and precision reverse-rotation tooth geometry. The 5.13 ratio of the YG D30R-513R paired with the factory NP231 transfer case provides the lowest available crawl ratio for the XJ and YJ platform without a doubler or SYE conversion.

Features and Benefits

• High-grade steel with precision heat treating for extreme off-road durability
• 5.13 ratio delivers maximum crawl capability for Jeep XJ and YJ builds running 33 to 37 inch tires
• Precision reverse-rotation tooth geometry engineered for the high-pinion Dana 30 axle
• 26-spline pinion shaft as specified for Dana 30 reverse-rotation applications
• OEM-spec ring gear diameter and bolt pattern for direct fitment
• Must be paired with matching 5.13 rear gears for correct 4WD operation
• Compatible with ARB, Eaton Detroit Locker, and other aftermarket carriers for the Dana 30
• Backed by Yukon Gear Y.E.S. extended service protection plan option

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, or high-pinion Dana 30, has the pinion gear entering from the top of the ring gear rather than the bottom. This configuration was used in the front axle of 1984 through 2001 Jeep XJ, YJ, Comanche, and Grand Wagoneer models for improved ground clearance.

Is 5.13 the right ratio for my XJ or YJ with big tires?
A 5.13 ratio provides the deepest available crawl capability for the Dana 30 reverse platform, making it ideal for XJ and YJ builds running 35 inch or larger tires with the factory NP231 transfer case.

Does YG D30R-513R require matching rear gears?
Yes. For correct 4WD engagement, front and rear differentials must use the same gear ratio. A matching 5.13 ratio gear set for the rear axle is required when installing the YG D30R-513R.

Does installing YG D30R-513R affect my factory warranty?
Under the Magnuson-Moss Warranty Act, a dealer cannot void your vehicle warranty solely because an aftermarket part was installed. The dealer must prove that the specific aftermarket component caused the failure being claimed.

What install kit is needed for YG D30R-513R?
A Dana 30 master installation kit with new pinion and carrier bearings, seals, shims, and a crush sleeve is required for correct gear mesh and preload. Purchase separately.

Can I use YG D30R-513R with an ARB Air Locker or Detroit Locker?
Yes. The ring and pinion set is independent of the carrier. The YG D30R-513R is compatible with most aftermarket carriers and lockers designed for the high-pinion Dana 30 axle.

What gear oil is recommended for the Dana 30 after installation?
Use 75W-90 full synthetic gear oil. If an air locker is present, check the locker manufacturer's requirements, as some units specify a particular viscosity or additive package.

What break-in is required after installing YG D30R-513R?
Avoid heavy off-road loads or extended high-speed driving for the first 500 miles. Change the differential fluid at the conclusion of the break-in period to clear metallic particles generated during initial gear seating.

Installation Instructions

1. Drain differential fluid and remove axle shafts and the differential cover from the housing.
2. Mark bearing caps with a punch before removal, then pull the carrier assembly.
3. Press off the old ring gear and clean the carrier flange mating surface.
4. Install the new ring gear from YG D30R-513R and torque all bolts in a cross pattern to the specified torque value.
5. Remove the old pinion, bearings, and crush sleeve from the axle housing.
6. Press new pinion bearings into the housing bores and onto the pinion shaft.
7. Determine correct pinion depth using a depth gauge and shim stack per the Yukon instruction sheet.
8. Set pinion bearing preload within specification using an inch-pound torque wrench and new crush sleeve.
9. Reinstall the carrier with correct side bearing shim stack to achieve specified backlash range.
10. Check gear contact pattern with marking compound and fine-tune shim stacks as needed.
11. Install the cover with new gasket or RTV and fill with the correct gear oil to the proper level.
12. Break in gears gradually over 500 miles before extreme use, then perform an immediate 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.