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This is the single most important thing on the page: the 2.0L EcoBoost Maverick and the 2.5L hybrid Maverick do not use the same transmission fluid. They are not even close. The EcoBoost has a conventional eight-speed automatic. The hybrid has a power-split electronic CVT. Pour one truck's fluid into the other and you will cause shift problems at best and internal damage at worst. Confirm which engine you have before you buy a single bottle.
| Maverick Drivetrain | Transaxle | Required Fluid |
|---|---|---|
| 2.0L EcoBoost | 8F24 8-speed automatic | Motorcraft MERCON ULV (WSS-M2C949-A) |
| 2.5L Hybrid | eCVT power-split transaxle | Motorcraft MERCON LV (WSS-M2C938-A) |
2.0L EcoBoost: MERCON ULV Only
The 8F24 eight-speed automatic in the EcoBoost Maverick calls for Motorcraft MERCON ULV, which meets Ford spec WSS-M2C949-A. ULV stands for ultra-low viscosity. This fluid is thinner than the MERCON LV used in older Fords, and the transmission's clutch clearances, solenoid response, and shift calibration are all designed around that thinner fluid. This is not a case where "any DEXRON/MERCON multi-vehicle fluid" is fine.
What happens if you use the wrong fluid? Substitute a thicker fluid like MERCON LV or a generic multi-vehicle ATF and you get delayed or harsh 1-2 shifts, torque converter shudder, and slow response when cold. Do it long-term and you accelerate clutch wear. The fix is a full fluid exchange with the correct ULV, and if you caught it early there is usually no permanent harm.
Good ULV Choices
- Motorcraft MERCON ULV (Ford part XT-12-QULV) — the factory fluid, the safe default.
- Valvoline MaxLife ULV or a full-synthetic labeled to meet WSS-M2C949-A — a widely available equivalent. Always confirm the bottle explicitly lists the 949-A spec, not just "MERCON."
Check MERCON ULV fluid
2.5L Hybrid: MERCON LV for the eCVT
The hybrid Maverick's power-split transaxle is a planetary gearset with two electric motor-generators, similar in concept to the Escape Hybrid unit. It does not have friction clutch packs or a torque converter. Ford specs Motorcraft MERCON LV (WSS-M2C938-A) for this transaxle. Do not put ULV in the hybrid, and do not put the hybrid's LV in the EcoBoost. Match the fluid to the drivetrain.
Check MERCON LV fluid
Capacity and Change Interval
The 8F24 holds roughly 7 quarts total (the full dry fill during a rebuild is more; a drain-and-fill through the pan replaces only a portion). Because these transmissions have no dipstick, checking level is a temperature-controlled procedure done through a fill plug on level ground with a scan tool watching fluid temperature. Overfill or underfill and the truck shifts poorly.
Ford lists the fluid as "fill for life" under normal service, but that is a marketing interval, not a longevity interval. Any truck that tows, hauls in the bed, or lives in heat should get the fluid changed. Real-world guidance:
- Normal driving: drain and fill every 60,000 miles.
- Towing, hauling, hot climate, or a tune: every 30,000 to 45,000 miles.
- Never do a high-pressure "flush" on a high-mileage unit that has never been serviced. A pan drain-and-fill or a cooler-line fluid exchange is the safe method.
How to Check and Fill (No Dipstick)
- The Maverick has no transmission dipstick. Level is set by temperature at a fill/check plug, with the truck level.
- You need a scan tool that reads transmission fluid temperature. The correct level is checked in a specific temperature window (Ford's procedure), typically with fluid warmed into a defined range.
- Fill until fluid just weeps from the check port at the correct temperature, then plug it. Too cold and you overfill; too hot and you underfill.
- If you are not set up to do the temperature check, have a shop set the final level. Getting it wrong is the most common cause of a "it shifts worse after I serviced it" complaint.
Correct Fluid, Filter & Pan Gaskets — Ships Same-Day
Doing the Maverick's service right means the correct ULV or LV fluid, the right pan gasket or filter kit, and the fill plug crush washer. gearboxinsider.com stocks the fluid and service parts and ships same-day before 2pm Eastern.
Shop Gearbox Insider →FAQ
Can I use MERCON LV in my EcoBoost Maverick?
No. The 8F24 requires MERCON ULV (WSS-M2C949-A). LV is thicker and will cause harsh shifts and converter shudder. They are different specifications.
Is the Maverick transmission really "sealed for life"?
Ford labels it that way, but heat and towing degrade any fluid. If you want the transmission to last past 150,000 miles, change the fluid on a real interval.
How do I know which engine I have?
Check the window sticker, the door jamb, or the engine cover. The 2.5L hybrid badge says "Hybrid." If it is not a hybrid, it is the 2.0L EcoBoost with the 8F24.
Do I need to change the filter too?
The 8F24 has an internal filter that is serviced when the pan is dropped. On a routine drain-and-fill you can reuse it; on a first-time service of a high-mileage truck, replace the filter and pan gasket while you are in there.