Notorious Noisy centre diff after 3 runs?

[Marko R1]

I added 50k oil on front diff & 30k oil on rear diff but I’ve now noticed a scratchy sound from centre diff? This is only my 3rd on the car - does it need a rebuild?

 

[The Bean]

Is if from the diff itself or the spur/pinion?

 

[Marko R1]

Is if from the diff itself or the spur/pinion?

I don’t think it’s the spur/pinion as the mesh is good?
The noise happens when it’s under load and only when I give it throttle

 

[Mycloud]

Same here. I got an used Noto and after tearing apart all parts and put it together with exb chassis brace there is a lot of noise from center diff/pinion gear. I rebulid center diff and noise still there.

May try borrowing a center diff from my new Kraton exb for testing