Should I Replace Transfer Case for $3400?

[BMW_E53]

So today I opened the TC actuator motor to see what the gear looked like before ordering parts and I found that its in relatively good condition. What are your guys' thoughts? I know I didn't take pictures along the gear itself because I didn't want to bombard you all with a ton of photos, but there wasn't any damage or much wear on the teeth like in the youtube videos from other DIYs.

Attached below are the pics of the black gear and the white gear as well. Looks like the white gear is starting to develop a crack so I was planning to purchase the whole Genuine BMW kit from ECS and replace the whole thing. Anybody know a reason why the three lights appeared and then went away?