Join @Tech Tim in the Northridge4x4 DIY garage to get a closer look at the 4340 rear axle shafts from Revolution Gear and Axle:
You can get a set for your JL or JT here:
JT Sport/Overland: https://www.northridge4x4.com/part/axle-shafts/dc-d44jt-sport-revolution-gear-rear-axle-kit
JL/JT...