904 Flares on 2-3 shift?

im having the same issue and just noticed it this over the week end shifting form 2-3 4k shifts nice over that like you get a little neutral sound before going into 3rd. Just had this 904 built with the Turbo action fmvb early march.. I hope its only a band adjustment as Fishy68 mentioned. New steels and clutches , bands and some hard parts i supplied.