8F35 Transmission Cooler 2022-2025

This is a used, factory Ford transmission oil cooler for the 8F35 eight-speed, Ford part number JX6Z-7869-C. It came off a 2022 Ford Maverick with the 2.0L EcoBoost, the 8F35 automatic and all-wheel drive, showing about 105,000 miles. Buyers looking for it usually have one of three problems: Mercon ULV dripping from the cooler or its fittings, a transmission that has just been rebuilt or replaced after a planetary or pump failure and needs a clean cooler, or a cooler damaged by road debris or a front-end hit.

What the oil cooler does on an 8F35

The 8F35 sends fluid out of the case through a steel feed line, through this cooler and back through a return tube. Ford lists the cooler as an oil cooler assembly and also calls it the auxiliary cooler. In Ford's parts diagram it sits with a bypass valve (JX6Z-7H322-A), the cooler inlet and return tubes, clamps, O-rings and seals. The bypass valve decides when fluid flows through the cooler, so a cold transmission warms up quickly and a hot one gets cooled. On an eight-speed with tight clearances and thin Mercon ULV fluid, keeping temperature stable matters for shift quality and clutch life. When the cooler leaks, plugs or holds debris, the transmission pays for it.

Symptoms of a bad or contaminated cooler

• Red ATF on the cooler body, at the tube connections or under the front of the vehicle
• Low fluid level with no leak at the pan or case seals
• Fluid that runs hotter than normal when towing or climbing grades
• Repeat failure after a rebuild because metal from the old failure was trapped in the cooler and flowed back into the new unit
• Physical damage: bent fins, a crushed tube or a cracked fitting after an impact

The last two matter most on this transmission. Ford bulletin 22-2281 covers 8F35 units built before late 2021 that slip or engage harshly because the output planet carrier needle bearings wear, and that kind of failure fills the fluid with metal. Read our 8F35 TSB guide for which bulletin matches your symptoms.

How to confirm before you buy

Clean the area, run the vehicle to temperature and look for fresh fluid at the cooler and fittings. If the transmission failed internally, do not trust the old cooler even if it is dry. Backflushing a cooler often leaves debris in it. Our guide to flushing a transmission cooler after a failure explains when a flush is enough and when to replace the cooler. If you are still diagnosing shifts, the 8F35 problems and cost guide covers the common faults.

Fitment

Ford's catalog lists JX6Z-7869-C for these 8F35 gas applications: 2020-2022 Escape 1.5L and 2.0L, 2021-up Bronco Sport 1.5L, and 2022-up Maverick 2.0L. This cooler was removed from a 2022 Maverick 2.0L AWD. The listing covers 2022-2025. Ford also lists the same number for some 2.5L hybrid models, but those use a different transmission, so this page is about the 8F35 only. Ford adds option notes, including cooling and off-road packages, to some applications. Before ordering, compare the part number stamped or labeled on your old cooler with JX6Z-7869-C, or send us your year and VIN. More 8F35 parts are on the 8F35 collection page.

Install notes

• Disconnect the tubes at the cooler. Replace the O-rings and seals on each connection with new ones. Ford services them separately, and an old O-ring is the usual cause of a leak after a cooler swap.
• Check the bypass valve. If your transmission failed internally, replace the valve too, because debris can hold it open or closed.
• Fill with Mercon ULV only. Ford's fluid chart specifies ULV for the 8F35 in these vehicles, and LV is not a substitute.
• Check the level hot at the specified temperature. A cooler swap loses a small amount of fluid that has to be replaced.
• If you are installing it as part of a rebuild, pair it with the 8F35 overhaul kit. If the pump was damaged by debris, use a replacement 8F35 pump.

It is a used OEM part, so inspect it when it arrives. Check the fins, tubes and fittings before you install it, then pressure-check the connections after the first drive.

Is this a new or used cooler?

Used. It is a genuine Ford JX6Z-7869-C cooler removed from a 2022 Maverick 2.0L AWD with about 105,000 miles. Inspect the fins and fittings before installing.

Will it fit my Escape or Bronco Sport?

Ford lists JX6Z-7869-C for 2020-2022 Escape 1.5L and 2.0L and 2021-up Bronco Sport 1.5L with the 8F35. Some applications have option notes, so match the number on your old cooler or send us your year and VIN.

Do I have to replace the cooler after a transmission failure?

If the transmission shed metal, a new or known-clean cooler is the safe choice. A flushed cooler can still hold debris that flows into the rebuilt unit.

What fluid does the 8F35 take?

Mercon ULV. Ford's fluid chart specifies ULV for the 8F35 in the Escape, Bronco Sport, Edge and Corsair, and Mercon LV is not the same fluid.

What else should I replace with it?

Replace the O-rings and seals on each tube connection. If the transmission failed internally, also replace the bypass valve, JX6Z-7H322-A in Ford's diagram.

Does it fit the Maverick hybrid?

Ford lists the same cooler number for some 2.5L hybrid models, but those use a different transmission. This page covers 8F35 gas applications. Confirm the number on your old cooler before ordering.

• Ford 8F35 Transmission Problems: What the Four Ford Bulletins Actually Say