17-70 BUI/GM/OLD/PON

Everything about the Yukon Grizzly Locker is hardcore, its casing and gears, its advanced gear tooth design, and its impact on traction and performance. The Yukon Grizzly Locker is a mechanical positive-locking differential that’s engineered for rock crawling, serious trail running, off-road racing, and drag racing. The unit provides 100% power to both tires, while still allowing for disengagement while negotiating turns. The Yukon Grizzly Locker is a patented design that features innovations that make it tougher than the competition. Its inner clutch teeth have a larger radius at the base, which offers up to 350% greater strength versus back-cut designs. The Grizzly Locker’s larger teeth also resist breakage caused by shock-loading or catastrophic axle failure. It’s a serious piece of mechanical engineering for serious driving conditions.

Everything about the Yukon Grizzly Locker is hardcore, its casing and gears, its advanced gear tooth design, and its impact on traction and performance. The Yukon Grizzly Locker is a mechanical positive-locking differential that's engineered for rock crawling, serious trail running, off-road racing, and drag racing. The unit provides 100% power to both tires, while still allowing for disengagement while negotiating turns. The Yukon Grizzly Locker is a patented design that features innovations that make it tougher than the competition. Its inner clutch teeth have a larger radius at the base, which offers up to 350% greater strength versus back-cut designs. The Grizzly Locker's larger teeth also resist breakage caused by shock-loading or catastrophic axle failure. It's a serious piece of mechanical engineering for serious driving conditions.

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.

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.

1.781in. Large bearing journal design. Requires HD bearings for GM 8.5in. differentials. LM102949/LM102911

1.781" Large bearing journal design. Requires HD bearings for GM 8.5" differentials. LM102949 / LM102911

Yukon Gear Grizzly Locker For GM 8.5in & 8.6in / 30 Spline / 2.73+

Yukon Grizzly Locker for GM 8.5" & 8.6", 30 spline, 2.73 & up

Yukon Grizzly Locker for GM 8.5in./8.6in.; 30 spline; 2.73/up

Patented internal design reduces common locker failures

Fits GM 8.5 in. And 8.6 in. w/30 Spline Axles

Fits GM 8.5" and 8.6" with 30 spline axles

8620 internals for added strength

2.73 and up ratio only

Differential Carrier

Assembled in the USA

17-70 BUI/GM/OLD/PON

Mechanical Locker

YGLGM8.5-3-30