Cool man, sounds like you found the issue.
Btw S14 hub nut torque is different than an S13.
S14 torque 152-210 ft lbs
Also if they are cheap ass hubs, you should take the bearings apart and repack with good grease
Check this link if you need more info on hubs:
https://motoiq.com/project-silvia-th...gs-like-i-did/