Rpm fluctuation/drop then surge. | Ford Explorer Forums - Serious Explorations

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Rpm fluctuation/drop then surge.

Ian Bungart

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Joined
September 12, 2018
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Year, Model & Trim Level
2007 EDDIE BAUER
so recently after hitting 200,000 on my 07 EX 4.0. my transmission between 3-4th gear
rpms will stay the same,@2000 then drop,1800 then spike up to 3000 then shift into 4th gear, it doesn't do it all the time, and i can drive slow or be "nice to the transmission" it will still lag but not search for a gear, however if i am attempting to pass or accelerating rapidly like on an on ramp or midway through turning a corner it will do this.
any ideas? regular maintenance by the ford book since purchased at 75,000 new valve body or block at 89,000 from FORD. and regular filter and flush changes at 50,000 mile intervals by ford.
no warning lights, and no signs of failure up until this point and still no warnings just the intermittent rpm fluctuation. has anyone else had this problem?
 






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