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Others may disagree, my opinion is, if it's functioning properly, staying cool, and you're not getting chunkies on the drain plug, consider the noise part of the trans's "charm" :)
My guess is that you have a shift fork dragging a bit on a synchro collar. Seems others have stated the 3053a can be rather noisy (mine is a bit noisy too). Maybe a locating divit/detent in one of the shift shafts isn't exactly drilled where it should be, or one of the dogs on one of the forks...