Yukon Dana 60 Grizzly Locker - 30 Spline, 4.10 & Down Ratio
YGLD60-3-30
The Yukon Grizzly Locker for Dana 60 Axles is an automatic locking differential designed to keep both tires pulling when traction gets tough. Unlike an open differential that can leave one tire spinning, the Grizzly Locker automatically locks both axle shafts together under power to help maintain traction through rocks, mud, steep climbs, and uneven terrain. This version fits Dana 60 axles with 30-spline shafts and 4.10 or numerically lower gear ratios.
The Grizzly Locker uses a heavy-duty forged carrier with heat-treated 8620 steel internals built to handle the shock loads of large tires, deep gearing, and aggressive off-road driving. It operates mechanically without air compressors, wiring, or switches and allows differential action during turns when conditions permit. Compatible with applicable thick gear configurations, it's a practical traction upgrade for rock crawlers, trail rigs, work trucks, and custom Dana 60 axle builds.
Includes:
- (1) Yukon Dana 60 Grizzly Locker Assembly
- Fully Assembled Internal Locking Mechanism
Installation Note: Carrier bearings, shims, and differential installation components are not listed as included. Verify the required parts for your axle before installation.
Specifications
| Manufacturer | Yukon Gear & Axle |
|---|---|
| Part Number | YGLD60-3-30 |
| Product Type | Automatic Mechanical Locker |
| Axle Platform | Dana Spicer 60 |
| Axle Spline Count | 30-Spline |
| Carrier Break | 4.10 and Numerically Lower Gear Ratios |
| Thick Gear Compatibility | Yes, Where Applicable |
| Internal Material | Heat-Treated 8620 Alloy Steel |
| Carrier Construction | Heavy-Duty Forged Case |
| Locking Type | Automatic Mechanical |
| External Controls Required | No |
| C-Clip Compatible | No |
| Assembly | Fully Assembled Carrier |
| Country of Assembly | USA |
| Installation Type | Differential Carrier Replacement |
| Primary Application | Off-Road Traction Upgrade |
| Quantity | Sold Individually |
Fitment
Designed for Dana 60 differentials using 30-spline axle shafts and 4.10 or numerically lower gear ratios. Compatible with applicable thick gear configurations. Verify your installed axle before ordering.
| Make | Model | Year Range | Axle Application |
|---|---|---|---|
| Chevrolet | C/K Series, Suburban, G30, V30 | 1964–1988 | Dana 60 Front / Rear, 30-Spline |
| Dodge | D/W Series, Ram 2500, Ram 3500, B-Series Vans, Ramcharger | 1960–2003 | Dana 60 Front / Rear, 30-Spline |
| Ford | F-100, F-250, F-350, E-Series Vans | 1954–2002 | Dana 60 Front / Rear, 30-Spline |
| GMC | C/K Series, Suburban, G35, V3500 | 1967–1987 | Dana 60 Front / Rear, 30-Spline |
| Jeep | Wagoneer | 1963–1976 | Dana 60 Rear, 30-Spline |
| Dodge / Plymouth | Charger, Dart, Barracuda, GTX, Fury, Road Runner | 1966–1970 | Dana 60 Rear, 30-Spline |
Fitment Notes:
- Fits Dana Spicer 60 differentials with 30-spline axle shafts
- Designed for 4.10 and numerically lower gear ratios
- Compatible with many thick gear applications when properly matched to the carrier
- Not compatible with C-clip axle applications
- Verify axle model, spline count, carrier break, gear ratio, and gear configuration before ordering
- Vehicle applications are reference fitments; factory axle configurations may vary
FAQ
What is the difference between a Grizzly Locker and a limited-slip differential?
A Grizzly Locker mechanically locks both axle shafts together under power, while a limited-slip differential uses clutches or other internal mechanisms to reduce wheel-speed differences and transfer torque. The Grizzly provides a more aggressive traction solution for situations where one tire may lose contact with the ground.
Will this Grizzly Locker fit every Dana 60 axle?
No. This version is designed for Dana 60 differentials with 30-spline axle shafts and a 4.10-and-down carrier configuration. Other Dana 60 axles may use different spline counts, carrier breaks, or internal configurations.
Can I use this locker with thick ring and pinion gears?
Yes, in compatible applications. Thick gears allow certain numerically higher ratios to be installed on a carrier designed for numerically lower ratios. Verify that your ring and pinion set is specifically designed for the 4.10-and-down Dana 60 carrier before installation.
Is the Yukon Grizzly Locker good for rock crawling?
Yes. The Grizzly Locker is a strong option for rock crawlers and trail rigs because it automatically locks the axle shafts together when torque is applied. This helps keep the vehicle moving when one tire unloads on a ledge, climbs a rock, or loses traction on uneven terrain.
Does the Grizzly Locker require an air compressor or electrical switch?
No. The Grizzly Locker is fully mechanical and operates automatically. There are no air lines, compressors, electrical switches, or wiring to install.
Can I drive a Dana 60 Grizzly Locker on the street?
Yes, when installed in an appropriate street-driven application. However, automatic lockers behave differently from open differentials. Drivers may notice clicking, changes in handling, or tire scrub during low-speed turns and parking maneuvers. Front axle applications can also affect steering behavior when four-wheel drive is engaged.
Do I need to reset my ring and pinion when installing this locker?
Yes. Replacing the differential carrier requires checking and setting carrier bearing preload, ring gear backlash, and tooth contact pattern. Even when reusing the existing ring and pinion, the new carrier must be installed and adjusted correctly to avoid gear noise and premature wear.
