The Global Sales GroupEZ Oil DrainValve, No. EZ-204, is designedfor Allison transmission drains. One of the common thread sizes for Allison transmission pans is the 3/4" 16UNF thread. This valve can be used for this application and assists in draining for transmission fluid changes and flushes. The drain valve, which is nickel-plated for extra protection, features a ball valve mechanism for leak-proof operation; an O-ring seal for improved sealing ability; a reinforced plastic handle cover for easy open/close; and an easy hose connection. This drain valve can also assist in oil sampling.