Is anyone having trouble with the gearbox?

[Bearingman]

The gearbox that we got from the kitbot has been having problems. When we tighten the gearbo completely, the shaft locks and becomes EXTREMELY diffucult to rotate. We talked to our mentors about loosening the gear box, because it let the shaft rotate more freely on its axis but he also said it had a preset torque setting that we should try to match. Does anyone have any ideas that we can use to solve this problem.. Is anyone else having a similar problem? The collars of the bearings are on the wroong side.. or at least thats whay my teamates tell me but some say it doesn't matter