Have a 2001 windstar 109,000 miles. It started sifting hard in low gears and hesitated before shifting. I had it back flussed. It shifted good for 2 or 3 days then started bad again. Am I doomed or would changing the filter fix the problem in case the back flussing didn't do a good job.

Yes, try to drop and clean the pan and magnet, change the filter (which may be a chore), and refill with Mercon V. Back flushing an ATX can be dangerous, since it can stir up crud which can seriously clog the filter.

Thanks, Need all the help I can get.

In the future, perform the above procedure every 30,000 miles.

In the future, perform the above procedure every 30,000 miles.

I did back flush at 60,000, I'll do is sooner next time. Thanks.