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
The Dana 30 is a common axle in Jeep builds, but traction becomes a limiting factor as tire size and terrain difficulty increase. A mechanical locker like the Grizzly ensures both wheels receive equal torque under load, dramatically improving climbing ability and control.
Because the Dana 30 is a lighter-duty axle, proper setup and component matching are critical. Using the correct carrier bearings, shims, and ensuring proper backlash and preload will help maximize durability and performance under off-road stress.