Yukon Dana 30 Grizzly Locker - 30-Spline, 3.73 & Up
YUKYGLD30-4-30
Built for Dana 30 axle builds that need real traction, this Yukon 30-spline Grizzly Locker is a serious upgrade for Jeeps, lightweight trucks, and trail rigs pushing beyond factory limits. This mechanical locker delivers true lockup—sending 100% of available torque to both axle shafts under load. It’s ideal for builds that have outgrown open differentials or limited slips and need consistent, reliable traction in off-road conditions.
The patented gear design features larger engagement teeth and improved tooth geometry, significantly increasing strength and reducing common failure points. Built with 8620 steel internals and assembled in the USA, this locker is engineered for durability while still allowing disengagement during turns for improved steering control.
Includes:
- (1) Mechanical locking differential (30-spline)
- Fully assembled internal gear set
- Installation-ready unit for Dana 30 carriers
Specifications
- Fits Dana 30 differential
- 30-spline axle compatibility
- Carrier: 3.73 and numerically higher gear ratios
- Automatic mechanical locking differential
- 100% torque transfer under load
- 8620 steel internal components
- Patented gear design for increased strength and durability
- Assembled in the USA
- Uses carrier bearings LM102949 & LM102911
- Requires SK30214 carrier shims
Fitment
| Make | Model | Year Range |
|---|---|---|
| American Motors | Eagle | 1980–1988 |
| Ford | Aerostar | 1986–1989 |
| Ford | Bronco | 1966–1971 |
| International | Scout 800 | 1967–1971 |
| International | Scout II | 1971–1974 |
| Jeep | Cherokee XJ | 1984–2001 |
| Jeep | CJ5 | 1971–1983 |
| Jeep | CJ6 | 1966–1975 |
| Jeep | CJ7 | 1976–1986 |
| Jeep | Comanche MJ | 1986–1992 |
| Jeep | Commando | 1967–1973 |
| Jeep | Grand Cherokee ZJ | 1993–1998 |
| Jeep | Grand Wagoneer | 1984–1993 |
| Jeep | Scrambler CJ8 | 1981–1986 |
| Jeep | Wagoneer | 1971–1973 |
| Jeep | Wrangler YJ | 1987–1995 |
| Jeep | Wrangler TJ | 1997–2006 |
| Jeep | Wrangler JK Non-Rubicon | 2007–2017 |
| Volvo | 142 | 1970–1974 |
| Volvo | 144 | 1970–1974 |
| Volvo | 164 | 1970–1975 |
| Volvo | 240 | 1990–1993 |
| Volvo | 242 | 1975–1984 |
| Volvo | 245 | 1975–1989 |
| Volvo | 265 | 1976–1981 |
Uses carrier bearings LM102949 & LM102911
Requires SK30214 carrier shims
Tech Insight
What are the benefits of installing a Grizzly Locker in a Dana 30 axle?
A Yukon Grizzly Locker provides full mechanical lockup when torque is applied, sending power to both axle shafts instead of allowing one tire to spin. This dramatically improves traction for rock crawling, trail riding, mud, snow, and other off-road conditions where open differentials often struggle.
Will this Grizzly Locker fit my Jeep Dana 30 axle?
This locker fits Dana 30 axles equipped with 30-spline axle shafts and carriers designed for 3.73 and numerically higher gear ratios. Many Jeep Cherokee XJ, Wrangler TJ, Wrangler YJ, CJ, and non-Rubicon JK applications use Dana 30 front axles, but axle configuration should always be verified before ordering.
How does a Grizzly Locker compare to a limited-slip differential?
A limited-slip differential transfers some power to the tire with traction, but it can still allow wheel spin in difficult terrain. A Grizzly Locker mechanically locks both axle shafts together under load, delivering 100% of available torque to both wheels for maximum traction when climbing rocks, navigating mud, or crossing uneven terrain.
Is the Yukon Grizzly Locker strong enough for larger tires?
Yes. The Grizzly Locker features 8620 steel internals, large engagement teeth, and patented gear geometry designed to withstand the increased loads associated with larger tires, lower gearing, lockers, and aggressive off-road driving. It is one of the strongest automatic lockers available for Dana 30 applications.
What other parts are needed to install this Dana 30 locker?
This locker uses LM102949 and LM102911 carrier bearings and requires SK30214 carrier shims during setup. Proper carrier preload, backlash, and gear pattern should always be verified during installation to ensure maximum differential performance and long-term durability.