I use a box end wrench just like at the diff ends and I’ve never had one come loose in near 30 years of wheeling.Installed a Tatton DC front shaft. Thing is solid, a bit narrower than OEM but thicker-walled.
Learned benefit of *tapered* 14mm impact sockets for this job. If anyone has insight into how (what tool) to properly torque the DC end of a shaft I'd love to know, I fashioned an extended crescent wrench tool but am looking for other ideas, there is very little room in there..
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