I did a pan drop and changed both filters and let it drain overnight. I went to walmart and bought 8 quarts of their atf+4. I went home and filled the tranny and took it for a test drive and it still needed a quart. I added the quart and then got all my empties together to recycle them and noticed two bottles were dex vi, all the bottles are blue at walmart. So with the refill i put 4 atf+4 and two dex iv. The tranny feels great. From what I've read it's ok and not ok. Anyone ever done something similar?