I have used these before on my 1998 Windstar AX4S Tranny that FORD Installed in 1994. I am Using Amsoil Signature Series Trans Fluid now since 2007 and will continue to do so. I have done 2 Full Tranny Services Inc Filter, Cleaned the Pan both times which wasn't to bad at all. Fingers Crossed it keeps Working...😎. This Price is Better than I can get at Any FORD DEALER!!! Thank You.