if you read technical journals produced by the sae or the design practices of automatic transmission etc.it usually states that the 90 degree race or corner of the bearing race shoud be installed up against the 90 degree corner of the mating part.in a 2004r as well as other units the black is usually used to identify the "this side up" of the bearing .this is not always the case as the overdrive ring gear bearing in the 200 has the black side facing down and all others the opposit way.pressing on the bearing and rotating it on each side will sometimes yield it proper position by how smooth it rotates.