The fluid in this kit is compatible with your transmission and is from the OE supplier. Your converter may have a drain however, not all 722.9 transmissions were equipped with one. If needed, it is part number 0019901117. It is inevitable that some of the original transmission fluid will remain in the transmission after a fluid service. The CTA 7650 transmission service tool is quite helpful for extracting the majority of the old fluid from your transmission.