The required fluid type is almost always stamped directly on the metal transmission dipstick.

For most modern Ford F-250s, the short answer is or Mercon V , but the exact type depends entirely on your truck's model year and engine .

Note: Some 2023+ models may require Mercon ULV; check your dipstick. Use Mercon LV . Ford superseded Mercon SP with LV for these years. 1997 – 2002 (4R100 Transmission): Use Mercon V .

Which does it have (e.g., 6.2L Gas, 6.7L PowerStroke)? Are you doing a simple drain or a full system flush ?

Using the wrong fluid can damage your transmission, so check the guide below to find your match. 🛠️ Quick Reference Guide Use Mercon LV .