Early Bronco Greaseable vs non-greaseable U-joints Universal Joint for driveshaft thump

About every 4-5 years I have to replace my driveshaft U-Joints. I was getting the usually low speed thumping sound. I forget to grease them regularly. I deceided to try these greaseless universal joints. I've read they are stronger and last longer. Time will tell. I will make a update video when they fail.
U-Joints in this video
https://amzn.to/3MijVIp

Cool Bronco Book
https://amzn.to/46GU312

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