And reading this tech manual, I see:

"Do not disassemble the internal hub mechanism. "

and

"Do not apply any lubricant to the inside
of the hub, otherwise the grease will
come out and it may cause problems
with conductivity. "

Without dissasembling, I see no way of fixing the squeak. My only recourse appears to be taking the wheel back apart and sending the hub back!

Any ideas? Any at all?