Yukon Gear 1995-2015 Toyota Tacoma Grizzly Locker 8.4in Rear 30-Spline

The Yukon Grizzly Locker YGLT100-30 is a mechanical locking differential designed for Toyota 8.4″ rear axles with 30-spline shafts (commonly used in T100, Tacoma, and early Tundra models). It allows full torque to both wheels under load, yet still unlocks on turns for drivability—ideal for dual-purpose street and off-road use. 

Key Specifications

• Axle Fitment: 8.4″ rear Toyota differential 
• Spline Count: 30 spline 
• Operating Mode: Mechanical locker — locks solid under load, unlocks when coasting in turns 
• Internal Construction: Uses 8620 steel internals with a patented design to reduce common locker failure modes 
• Warranty Options: Eligible for Yukon YES (Yukon Extended Service) plan 

Features & Benefits

• 100% Torque Distribution — Sends torque to both wheels equally when engaged, improving traction in low-traction conditions 
• Automatic Disengagement on Turns — Unlocks when sideloaded to allow smoother cornering and reduce driveline stress
• Proven Durable Design — Internal parts crafted with strength in mind to survive demanding conditions 
• Street & Off-Road Friendly — Designed for daily drivability while offering aggressive locking capability when you need it 

Fitment & Compatibility

• Fits Toyota 8.4″ rear differential housings using 30-spline axle shafts 
• Common applications include Toyota T100 (1993-1998), early Tacoma, early Tundra, and other vehicles using the 8.4" 30-spline rear 
• Works with factory or aftermarket ring & pinion sets (verify proper backlash and preload) 

Notes & Considerations

• Proper install torque, shimming, and break-in procedures are essential for long life.
• Because it locks both wheels under load, expect slightly increased tire wear in tight turns or aggressive driving.
• Check for compatibility with brake gear, gear ratio, and axle housing before purchase.

Questions? We’re Here to Help.

Have questions about differential upgrades or drivetrain parts for your truck? Our team at FASS Motorsports is here to assist:

• Phone: 636-429-7020
• Email: info@fassmotorsports.com