Which Synthetic ATF?
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Senior User
Joined: May 2006
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From: Versailles, KY
Which Synthetic ATF?
The owners manual seems to be REAL picky about the ATF. What have others used with success?. At 91,000 miles, and unknown history, should I drop the pan, replace the filter, refill, and then do a full flush, or should I go on and do a full flush?
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Joined: Jul 2003
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Originally Posted by ReAX
The 100r4 trans has been down graded by ford, they now say any Mercron 3 compatable fluid is good.
Second, there is no such thing as MERCON 3 fluid. There is MERCON, MERCON V, and MERCON SP.
Ford is discontinuing MERCON fluid in 2007. The 4R100 had only been rated to use MERCON, but now they changed MERCON V so that it is compatible with the 4R100.
You can still get MERCON fluid, and that's what I'd use. If you can't find it, MERCON V is now good for it, too.
