It's way too early to have that much confidence in the longevity of the JL axle. Sure, they're stronger, but the JL as a whole is still an unproven vehicle. When people were first starting to lift JKs, a lot of shops were seeing bent axles on Wrangler's that hadn't even been wheeled. Apparently, Dana wasn't welding them correctly before shipping them off to Jeep and simple things like potholes were tweaking them. This was an issue that continued well into 2008, too.id say the axle upgrades on the JL make this a mute point. if you have any plans of going 35's-37's which most people who modify will. The axle upgrades on the JL "should" be enough to handle this.
37's are absolutely going to take a toll on a stock JL axle. It's only a matter of time.my buddy has a JKUR on 37's and he has had plenty of axle problems, bent tube, bent C, small brakes. All of those were "fixed" on the JL Rubi axles. thicker tubes, beefed up c's, bigger brakes from the factory.