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Yukon Spools, strongest differential | RANDYS Worldwide

Yukon Spools

Do you require performance?  Yukon Spools are designed for just that! 

Precision machined from high-quality steel and heat-treated for maxinum strength, Yukon Spools permanently lock your differential for off-road and race use.  They are available in full, mini, and lightweight configurations so that you have a choice of going with maximum strength, a simplified installation, or minimized rotating mass.

What are the advantages of Yukon Spools?  No-hassle Traction!  Spools offer a simple traction solution by connecting axles directly to the ring gear. Full turning and variable wheel speed is sacrificed for 100% lockup.

Yukon’s engineers use state-of-the-art design and testing processes, backed by two in-house quality assurance labs, to ensure each gearset meets exacting specifications dimensionally, for hardness via heat-treating, and torsional strength.

  • Produced using superior materials
  • Engineered using state-of-the-art design software
  • Inspected to ensure precise accuracy and fitment
  • Provides 100% traction to both wheels at all times
  • Tested and proven in extreme motorsport competition
  • Backed by a Limited Lifetime warranty against manufacturer defects for as long as you own the vehicle
  • Not recommended for street driven vehicles

The traction that comes from a spool can provide the competitive advantage both on the strip or on the trail. For your spool needs, look no further than Yukon.

Shop Yukon Spools


When ever the gear ratio in a differential is changed pinion diameter changes. There are two things that must change in order for the gear ratio to change. First, the gear ratio is determined by the tooth combination. The number of teeth on the ring gear divided by the number of teeth on the pinion (eg: 41/11 = 3.73) equals the gear ratio.  Click to the article to read continue reading.

There are several types of rear ends that use a threaded side adjuster be it a single adjuster or one on both sides of carrier. The most commonly known rears with this type of carrier adjustment are the Chrysler 7.25-8.25-8.75-9.25, Ford 9”, GM 8.25” IFS, Suzuki Samurai, & Toyota. Click on the image to continue reading more.
Nic Ashby Wins 2020 American SuperJeep Challenge Builder of the Year – Proves Mettle at King of the Hammers with Yukon Gear & Axle® Drivetrain Components

Yukon Gear & Axle®, the leading performance off-road drivetrain supplier in North America, congratulates Rockstar Performance Garage owner Nic Ashby for being named 2020 SuperJeep Challenge Builder of the Year. Read more about Nic’s adventure in the blog article.