Yukon Gear 1995-2015 Toyota Tacoma Rear Diff w/ Grizzly Locker 30 Spline & 4.56 Ratio Drop Out Assembly
Can I pick up my order or have it installed at your shop?
Can I pick up my order or have it installed at your shop?
Absolutely. We offer local pickup on most products and full professional installation at our shop in Washington, MO. Whether you just want to grab your parts or have our techs handle the install, we’ve got you covered. Give us a quick call at 636-429-7020 or message us to schedule a visit — we’ll make sure the parts are ready when you arrive.
How do I know if this part fits my vehicle?
How do I know if this part fits my vehicle?
Unsure if it’ll fit? No problem — that’s what we’re here for. Send us your vehicle’s year, make, and model, and we’ll verify fitment before you order. We can also point you toward compatible upgrades or supporting parts if needed.
What if I need to return a product or it’s defective?
What if I need to return a product or it’s defective?
Most unused items can be returned within 30 days in their original packaging. Some products are covered by a manufacturer’s warranty as well. If something arrives damaged or doesn’t meet your expectations, just let us know — we’ll help you get it replaced, refunded, or repaired. (Tracking updates are also emailed automatically once your order ships.)
What's the lead time on custom or fabricated parts?
What's the lead time on custom or fabricated parts?
Many of our parts are built to order — especially fabricated or performance components. These can take additional time to produce before shipping. Lead times vary by manufacturer and demand, but we’ll always keep you updated along the way. If you’re working on a tight schedule, reach out before ordering at 636-429-7020 and we’ll confirm current availability or estimated ship dates.
Description
Description
The Yukon YDAT100-456YGL Dropout Assembly is a factory-shimmed, ready-to-install third member for Toyota 8.4″ rear axles (T100/Tacoma/Tundra). It ships with the ring & pinion already setup (4.56 ratio) and includes a Yukon Grizzly Locker to maximize both on-road and off-road traction. Simply drop it in your housing, fill with gear oil, and you’re ready to roll.
Full Product Specs
- Part Number / SKU: YDAT100-456YGL
- Ring & Pinion Ratio: 4.56 ish gearing
- Spline Count: 30 spline axles compatible
- Differential Type: Mechanical Grizzly Locker
- Included Yoke: Yes, pre-installed
- Shimmed & Backlashed: Yes, by Yukon factory techs
- Housing Material: Nodular iron for superior rigidity and strength
Vehicle Fitment
- Designed for Toyota 8.4″ rear differential setups using 30-spline rear axles (common in T100, Tacoma, early Tundra). Verify your housing before ordering.
Why Go with a Yukon Dropout?
- Plug-and-Go Installation: Delivered pre-adjusted—no setting backlash or preload at home.
- Stronger Case: Nodular iron resists flex and helps maintain precise gear tooth geometry under load.
- Locking Capability: Yukon’s Grizzly Locker provides full locking traction when needed and unlocks in turns.
Notes & Install Advice
- Ensure proper fluid fill and break-in steps after installation.
- Torque housing bolts to spec and re-check after first heat cycles.
- Because locker locks both sides under torque, expect increased tire wear in tight turns.
- Confirm compatibility with brake gear, axle housing, and bearing setup before ordering.
Questions? We’re Here to Help.
Have questions about suspension or drivetrain upgrades for your truck? Our team at FASS Motorsports is here to assist:
- Phone: 636-429-7020
- Email: info@fassmotorsports.com
