10R80 Transmission Cooler 2015-2019

If your 2015-2019 Ford F-150 or Raptor is running hot transmission temps while towing, pushing ATF out of the vent tube, or you are building the truck for trailer and off-road duty, this is a direct-fit replacement for the factory transmission cooler. It is the Mishimoto MMTC-F150-15SL, a silver tube-and-fin aluminum cooler that mounts in the stock location and reuses the factory hoses. Those model years cover both the late 6R80 six-speed and the first 10R80 ten-speed trucks, so this one cooler serves either transmission.

What the transmission cooler does in a 10R80 or 6R80 F-150

Every gear change, every torque converter lockup event and every stretch of slip under load turns into heat in the fluid. In the F-150 the ATF leaves the transmission, runs forward through the cooler at the front of the truck, and returns to the case. The 10R80 is especially sensitive to fluid condition because its ten ratios are controlled by solenoid pressure through a tightly machined valve body, and shift quality depends on the TCM adapting to how quickly each clutch fills. Cooked MERCON ULV loses friction stability, varnishes the valve body and shortens clutch life, so keeping the fluid in its intended range is cheap insurance on a very expensive unit.

Mishimoto states this core holds 184 percent more fluid than the stock cooler, with 105 percent more core volume, 212 percent more tube surface area and 132 percent more fin surface area. The design is repositionable so it fits both V6 EcoBoost and 5.0L V8 trucks.

Symptoms that point to the cooling side

• Transmission temperature climbing well above normal on the gauge when towing, climbing grades or in slow off-road crawling
• ATF pushed out the vent, often after a fluid service left the level high
• Dark, burnt-smelling fluid long before the service interval
• Harsh or erratic shifts that show up once the truck is fully hot and settle down when cool
• A leaking, kinked or road-damaged factory cooler core in front of the radiator

How to confirm before buying

Rule out an overfill first. Sonnax documents that just one extra quart in the Ford 10-speed makes it run hot and vent fluid, so check the level through the fill plug at the 206-215 F check temperature before blaming the cooler. Scan every module for codes, because harsh shifts on these trucks are more often adaptive or valve body related than heat related. Our 10R80 common problems and fixes guide walks through sorting overheating from the other failure buckets, and the 10R80 F-150 problems guide covers the truck-specific complaints. If the fluid is clean and the level is right but temperatures still run high under load, more cooler capacity is the fix.

Fitment

This listing is for 2015-2019 Ford F-150 and F-150 Raptor. Mishimoto markets the cooler as a direct fit for all 2015-2017 F-150 plus 2017-and-later Raptor, and its compatibility table extends through 2020 trucks. Because the direct-fit claim and the table do not cover exactly the same years, compare your factory cooler, its mounting points and its hose ends with the product photos before ordering, or send us your year and VIN and we will check it. Mishimoto does not list the 2021-up F-150 for this cooler; browse all ten-speed parts on our 10R80 parts page and see the 2021-2025 10R80 cooler for newer trucks.

Install notes

• Mishimoto rates the job as easy: the cooler bolts in with the included brackets and reconnects to the stock hoses.
• Expect to lose some fluid when the lines come off. Top up with MERCON ULV only, then set the level hot through the fill plug, not by quart count.
• If the old fluid was dark or full of debris, flush the lines before connecting a new cooler so the contamination does not go straight back into the valve body. A new 10R80 valve body is the next step if varnish has already caused sticking valves.
• After any work that disturbs shift quality, clear codes and run the Ford adaptive drive cycle. A bidirectional scan tool lets you read transmission temperature live and reset adaptives at home.

Pair the cooler with a fresh fluid service and a temperature gauge you actually watch, and the transmission gets the margin it needs for heavy towing seasons.

Will this cooler fit my 2018 F-150 with the 10R80?

The listing covers 2015-2019 F-150 and Raptor, and the manufacturer's compatibility table runs through 2020. To be safe, compare your stock cooler and hose ends with the photos or send us your year and VIN to confirm.

Does it fit the V8 and the EcoBoost V6?

Yes. Mishimoto designed it with a repositionable mount so the same cooler fits both V6 and 5.0L V8 trucks in the covered years.

Do I need new hoses?

No. It reuses the factory hoses, and the brackets and hardware come with the cooler.

What fluid do I use after installing it?

Use Ford MERCON ULV only. The cooler holds more fluid than stock, so set the final level through the fill plug at the specified hot check temperature instead of counting quarts.

My transmission is overheating after a fluid change. Is the cooler the problem?

Check the level first. A single quart of overfill makes the Ford 10-speed run hot and vent fluid. Correct the level and retest before replacing parts.

Does it fit a 2021 or newer F-150?

The manufacturer's compatibility table stops at 2020, so for a 2021-up truck see our 2021-2025 10R80 cooler instead.

• 10R80 Common Problems and Fixes
• 10R80 F150 Common Problems and Fixes
• 10R80 F150 Shift Problems: Diagnosis and Fix
• 10R80 Mustang Common Problems and Fixes