Yukon Gear 2005-2015 Toyota Tacoma Rear Diff w/ Grizzly Locker 30 Spline & 4.30 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 YDAT100-430YGL Dropout Assembly is a complete, pre-assembled third member designed for Toyota 8.4″ rear differentials using 30-spline axles. With a 4.30 gear ratio and an integrated mechanical Grizzly Locker, this unit arrives pre-adjusted and ready to install—just bolt it in, add fluid, and hit the road.
Technical Specifications
- Gear Ratio: 4.30
- Spline Count: 30 spline
- Differential: Mechanical Grizzly Locker
- Housing Material: Nodular iron, for improved rigidity and heat resistance
- Dropout Type: Complete third member with yoke pre-installed
- Factory Setup: Shims, preload, and backlash set at the factory — no setup required on your end
Fitment / Compatibility
- Intended for Toyota 8.4″ rear differential housings with 30-spline axle shafts.
- Often used in T100, older Tacomas, and early Tundra models—verify your current rear end before ordering.
Benefits & Use Cases
- Install-Ready: Comes pre-adjusted so you bypass complex differential setup.
- Stronger Construction: Nodular iron case maintains gear alignment under stress.
- Maximum Traction: Grizzly Locker locks both wheels under torque, enhancing off-road and low-traction performance.
Notes & Best Practices
- Follow break-in procedures for new ring & pinion units.
- Use the correct type and amount of gear oil as recommended by Yukon or Toyota specs.
- Expect slightly heavier turn feel and increased tire wear on hard turns due to full locking behavior.
- Confirm axle housing, bearing fits, and differential clearances before installation.
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
