2. Since the Yukon axleshafts are far stronger than stock, it's a no-brainer that strong U-joints should also be installed. Randy's offers two strong joints that work well in an application such as this. On the left is a beefy forged Spicer alloy joint that is much stronger than a stock U-joint. It's a good upgrade, and it's quite adequate for most folks when paired with Yukon alloy axleshafts. On the right is the awesome Yukon Super Joint, which is what we opted to use. They're priced quite a bit higher than the alloy joint, but they're also substantially stronger. In addition to their 4340 chromoly needle-bearingless construction, they feature O-ringed seals to keep out impurities and full circle retainers on the caps to ensure a tight fit. Their rock-solid construction makes them some of the beefiest U-joints you can buy.