Just checking if this is legit or a counterfeit part. I bought a transmission filter on Rockauto labeled as a Motorcraft filter. Then it came in it arrived in a standard USPS mail bag (no motorcraft bag) and the part was stamped Filtran Made in Mexico. I'm a bit suspicious about this one and am thinking of sending this back for a refund.. but wanted to check on its legitimacy. Anyone know if this is a bona-fide part by Motorcraft?