I just hit 1300mi and changed the oil/filter and transmission fluid (surpassed the break in period).

I'm wondering if I should change the (front diff) transfer case, rear differential, and rear AYC fluid as well. I know that the front and rear diff (gear oil) should be replaced at 30K (normal driving) but wondering if there are any metal shavings after break-in for the differentials. I'm not sure about the AYC (rear) fluid change since there's a lot confusion about whether it needs to be bled or not. I know the ACD/AYC pump and lines shouldn't be messed with.