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The answer to your question is no to Chase, and maybe to NFCU. Chase product change promos have been discussed at length on this forum, and the concensus is always that you are not eligible. Navy Federal requires that the it be a new account for the promotion to be valid, you could call in and see if they would let you apply for a Go rewards MASTERCARD and do the balance transfer promo, but I think that your chances of that happening are close to zero.
Just want to add that with NFCU the Flagship generally has a higher rate than the goRewards... if you want a lower rate you'll want to PC to a Platinum.