Transmission Drain Plug - Add On - Anyone done this

I put a $10 B&M tranny drain plug on all my auto-tranny vehicles. The auto tranny on my old '96 F250 diesel is still going strong after 20 years.

I've never had one leak.

I change the oil every 40K miles or so by draining the pan. Every other oil change I put in a new filter. This process keeps the oil fresh and viable, which is very important for heavily worked trannies that are used strictly for towing, like mine.