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4R75E OEM filter replace?

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Old Jun 25, 2025 | 07:52 AM
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JWA
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4R75E OEM filter replace?

OEM Filter replace Interval?

About to perform the Mark K full fluid exchange on my 2005 E-350 (5.4) last done 06/05/2022 leaving the original-type filter in place but changing the added external Magnifine 1-8721 (
https://www.amazon.com/Raybestos-Powertrain-Automatic-Transmission-suppressed/dp/B0065LZA94?source=ps-sl-shoppingads-lpcontext&ref_=fplfs&psc=1&smid=A33WFIG7XLWS7 https://www.amazon.com/Raybestos-Powertrain-Automatic-Transmission-suppressed/dp/B0065LZA94?source=ps-sl-shoppingads-lpcontext&ref_=fplfs&psc=1&smid=A33WFIG7XLWS7
that filter and existing Mercon V being in place just over 35K miles.

Should I replace the OEM-type filter this time or is it still good to go?
 
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Old Jun 25, 2025 | 08:54 AM
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Mark Kovalsky
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If the trans hasn't failed, the internal filter is still good.
 
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