Originally Posted by
masi61
No, it wouldn’t be better to grease them.
The threads on the 7400 freehub body are coarse. When using the correct splined Shimano tool to install it on the hub, it spins on completely in like 2 turns. Any grease on the threads would make it feel like the freehub body could be tightened more which potentially could crack the aluminum hub shell. This was my takeaway when I converted my 8 speed Uniglide 7402 freehub to the combi 8/9/10 speed 7403 freehub.
Fascinating! Was your takeaway the result of cracking the freehub?
I see that the threads on the mounting bolt are, indeed, coarse, but I'm still surprised at Shimano's instructions to not lube the threads.