Am looking for a complete set of directons to do a power steering fluid flush and fill on my 1998 Windstar. I need to ensure all of the old fluid is out of the system--previous flushes have resulted in the new fluid looking the same color (black) as the old after about a month of use. Van now has ~100K on it and would like it to last as long as possible. Thanks.
`97 F-150 4X4