Problem with DEX210 gearbox

[jaank]

I installed the new type B gearbox and geardiff with no shims between the bearing and diff. If i slowly rotate the spur with my hand i can feel a part of the turn where it's quite notchy and doesn't rotate really well.

I switched the main gear on the gear diff and rebuilt everything by the manual. The problem still exists, when i have the gearbox in my hand slowly rotating the spur gear then about 2/3 of the turn is still rotating hard. The only thing I can still think of is that the brand new gearbox is kinda tight.
When I have it open and rotate the gears by hand I don't see any additional drag or rubbing and everything is smooth.
Also after the diff rebuild, when rotating one side of the diff it's all quiet, when rotating the other side it makes a cliking noise. Fuck, as they say, you shouldn't touch a working thing.
All help is appreciated.