Extra Info:

1989-2002 DODGE RAM 2500
1989-1993 DODGE RAM 3500
1999-2013 FORD F-250
1994-2015 FORD F-350
2000-2004 FORD F-450/550
Fits Dana 60, 40 spline, 4.10 and down ratios. Grizzly Lockers are a mechanical locking differential designed for off-road and racing use. Patented design reduces common locker failures.
Yukon Grizzly Locker for Dana 60, 4.10 & down, 40 spline

The Yukon Grizzly Locker is the ultimate in mechanical locking differentials for street, off-road, and drag racing. Grizzly Lockers provide 100% power to both tires, while still allowing for disengagement while negotiating turns.
Fits Dana Spicer 60 with 40 spline axles
4.10 and down ratio only
Patented internal design reduces common locker failures
8620 internals for added strength
Assembled in the USA
Technical Notes: This locker is not compatible with c-clip axles.