Alloy USA 11502 X-Joint; Fits 07-18 Jeep Wrangler Rubicon JK/JKU, for Dana Super 44

I have a 2015 Rubicon with 35" tires and lift, so the factory U-joints took some abuse. These are an awesome upgrade over the factory (I attached a pic of the factory Rubicon U-joints vs the Alloy fro your reference). I love that these are serviceable with grease ports at each cap! This design makes them much stronger (versus drilling the body of the U-joint for a grease fitting). They are very smooth and SOLID!PRO TIP: Be very careful when pressing these into your axles. Since there is a grease fitting at the end of each cap, you can't just bang them in with a hammer or use a vice. I used a press with socket that only put pressure on the outside of the caps. Be sure you don't put pressure on the grease fittings! Take your time with these and you'll likely never put another u-joint on your jeep!

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Very robust design, well packaged and with long term serviceability in mind.

theyre nice, but not as smooth, as others, why?

Few months on them. Holding up fine to my 38s