I understand, MustangInTexas. The info is for the normal maintenance of the vehicle. When we’re talking warranty, the TSB does not call for it and does not show it to be covered. This is why I recommend you speak with your service manager when having this TSB performed.
I don't understand. Why would the "normal maintenance" call for something better than what one would expect on a TSB to fix an issue? seems jlbell4444 got it right. The TSB was written before the XL-18 was out. It still seems that the Transmission Fluid Chart would supersede the TSB instructions if you're changing out the transmission fluid. Why would you ever do a partial fix because the OLD instructions tell you to? One should not blindly follow instructions without a thought.