4340 Rear Shafts

[ducatijosh]

Hello, running 38" nitto ridge grapplers on the Dana 44s that came with my 2022 Rubicon. I upgraded to rear axle shafts to 4340 Chromoly Steel versions which should be stronger but does anyone know how much? Do people still bend / break splines with these? Can I drive like a dick with my 5.13s or do I have to be conservative?

Links to what I put in

https://www.northridge4x4.com/part/...ana-44-advantek-rear-left-e-locker-axle-shaft

https://www.northridge4x4.com/part/...na-44-advantek-rear-right-e-locker-axle-shaft

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[whiteglad]

First, heat treat also matters. Second, there are other weak points such as ring and pinion. As you get numerically high, the pinion gets smaller with fewer teeth.