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Discussion Starter · #1 ·
1999 Mercury Mountaineer 5.0L V8 AWD Tow Package. 180k miles.

Seems like the transmission sometimes shudders when downshifting from 4th to 3rd under mild acceleration. Its not too bothersome yet, but it does seem to be getting worse.

I guess it has the 4R70W transmission. Is that right?

I'll try changing the filter. What else should I check for while I'm down there. Is that tranny subject to valve body gasket blowout? Should I do the valve body gaskets as long as I've got the pan off? The fluid doesn't look or smell burnt. Should I flush it?

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