Shop All Transmission Parts →
The Maverick is a small truck that people ask to do big-truck work. A 2.0L EcoBoost with the 4K Tow Package is rated for 4,000 pounds, and owners hit that number pulling utility trailers, small campers, and loaded car haulers in the heat. The 2.5L hybrid is a different animal entirely (more on that below), but the EcoBoost truck runs an 8F24 eight-speed automatic transaxle that gets warm fast when the torque converter is working hard at low road speed. Heat is what kills these units, and a cooler is the cheapest insurance you can bolt on.
First thing to know: not every Maverick needs an aftermarket cooler. The 4K Tow Package already adds an upgraded cooling setup from the factory. If you have the base 2,000-pound Maverick and you tow anywhere near its limit, or you added a tune, or you live somewhere that runs 95 degrees all summer, an add-on cooler is the single best dollar-per-degree upgrade on the truck.
Does Your Maverick Even Need One?
Run down this list. If two or more apply to your truck, add a cooler.
- You have the standard 2.0L EcoBoost without the 4K Tow Package and you tow more than a couple hundred pounds regularly.
- You tow in hilly or mountainous terrain where the trans holds a lower gear and the converter stays unlocked.
- You added a tune or intake that raises torque and therefore fluid temp.
- You see the transmission temp climb on a scan tool or gauge past about 215-220 F under load. Sustained fluid temps above 240 F cut fluid life roughly in half for every 20 degrees over.
- You do a lot of stop-and-go in a hot climate, where there is no airflow and the converter never cools off.
The hybrid Maverick with the 2.5L and the electronic CVT (eCVT) power-split transaxle is a separate case. It does not have a conventional torque converter cooking fluid, and it is not rated to tow more than 2,000 pounds. Most hybrid owners do not need and cannot easily add a conventional trans cooler. This guide is written for the 2.0L EcoBoost truck.
The Coolers Worth Buying
Tru-Cool LPD 4454 — The Value Standard
The Tru-Cool LPD (Low Pressure Drop) stacked-plate cooler is the one most experienced installers reach for on compact platforms like the Maverick. The 4454 is compact enough to fit in the limited space ahead of the condenser, and the stacked-plate design flows fluid without the pressure drop that chokes a small transmission pump. It comes with -6 barb fittings and the mounting hardware. On a Maverick you are working with roughly 3/8-inch cooler lines, so plan your adapters accordingly.
Check Tru-Cool LPD 4454
Mishimoto Universal Stacked-Plate — Best Build Quality
If you want a cooler that looks and feels like a factory part, Mishimoto's universal stacked-plate coolers are TIG-welded aluminum with barb or AN fittings and a bracket kit that actually holds. They cost more than the Tru-Cool, but the fit and finish is worth it on a truck you plan to keep. Pick a core that fits the Maverick's narrow grille opening rather than the biggest one you can find, which will not fit.
Check Mishimoto coolers
Derale 13503 / 15960 Series — With Fan for Slow-Speed Towing
The Maverick's real weak spot is low-speed, high-load work: pulling a trailer up a grade at 25 mph, or crawling in summer traffic with a loaded bed. There is no airflow through the cooler at those speeds. A Derale plate-and-fin cooler with an integrated electric fan (the 15960 remote-mount series) moves air even when the truck is barely rolling. If your towing is mostly around town or off-road, the fan pays for itself.
Check Derale cooler with fan
Hayden 679 — Budget Plate-and-Fin
If the truck rarely tows and you just want a margin of safety for hot summers, the Hayden 679 plate-and-fin is a proven, inexpensive cooler. It flows less than a stacked-plate unit and is not what you want if you tow at the 4,000-pound limit, but for light duty in a hot climate it does the job for the least money.
Check Hayden 679
Cooler Type — Stacked-Plate vs Plate-and-Fin vs Tube-and-Fin
| Type | Cooling | Best For |
|---|---|---|
| Tube-and-fin | Lowest | Cheap, light duty, tight budgets |
| Plate-and-fin | Middle | Occasional towing, hot climate daily driver |
| Stacked-plate | Highest | Regular towing at or near the 4,000 lb limit |
For a Maverick that tows seriously, buy a stacked-plate cooler. It moves the most heat for a given frontal area, which matters when the space ahead of the radiator is as small as it is on this truck.
Install Notes Specific to the Maverick
- Mount it in series, not bypass. Route the fluid through the factory radiator cooler first, then the add-on cooler. The radiator acts as a warmer in cold weather so the fluid still reaches operating temp; the add-on cooler trims the peak. Do not delete the factory cooler.
- Space is tight. The Maverick's front end is packed. Test-fit before you drill. Most owners mount the cooler in front of the condenser using the included rubber isolators and the through-core mounting pins, being careful not to pierce the A/C condenser or radiator.
- Use the right line size. The Maverick's transmission cooler lines are small (about 3/8 inch). Use the correct barb-to-line adapters and quality worm-gear or fuel-injection clamps, and torque them in two passes. A cooler line that lets go under load dumps your fluid and cooks the trans in minutes.
- Add a temp gauge while you are in there. A cheap OBD-II reader that displays transmission fluid temperature, or a dedicated gauge with a sensor in the cooler line, tells you whether the cooler is actually doing its job. Fly blind and you will not know until it is too late.
- Top off the correct fluid after. The 8F24 uses Motorcraft MERCON ULV (ultra-low viscosity), Ford spec WSS-M2C949-A. Do not substitute standard MERCON LV or DEXRON. The wrong viscosity causes harsh or flaring shifts. Check and top off after the install so you are not low from the extra cooler volume.
Cooler Lines, Fittings & Fluid — Ships Same-Day
Doing the cooler install right means the correct AN or barb fittings, cooler line, clamps, and the right MERCON ULV to top off. Our companion shop gearboxinsider.com stocks cooler hardware and fluid and ships same-day before 2pm Eastern.
Shop Gearbox Insider →FAQ
Will a cooler void my Ford warranty?
Adding an external cooler by itself does not void the powertrain warranty under the Magnuson-Moss Act. Damage caused by a bad install (a pierced condenser, a leaking fitting) is on you, so do the work carefully or have a shop do it.
Do I need a cooler if I have the 4K Tow Package?
Not for normal towing. The tow package already upgrades the cooling. If you added a tune or you regularly tow at the limit in extreme heat, a supplemental cooler still buys you margin.
What transmission temp is too hot on a Maverick?
Fluid that lives around 175-200 F is happy. Sustained temps above 240 F under load are where fluid degrades fast. If you see 250 F or more on a scan tool while towing, back off and get a cooler on it before your next trip.
Can I add a cooler to the hybrid Maverick?
The 2.5L hybrid uses an eCVT power-split transaxle without a conventional fluid-cooling loop, and it tows only 2,000 pounds. There is no straightforward supplemental cooler for it, and it does not need one for its rated duty.