8F35 Sun Shell

Shopping for an 8F35 sun shell usually starts at teardown: the shell on the forward drum is cracked at the weld, the splines are chewed, or the drum it rides on is scored and you need the whole piece. This listing is a used, cleaned and inspected genuine Ford assembly, part number JM5P-7F213-FA, made up of the loaded forward (input) drum with its sun shell and input shaft still attached. It comes out of an 8F35 eight-speed used in the Ford Edge, Escape, Bronco Sport, Maverick, Transit Connect and the Lincoln Nautilus and Corsair.

One thing to sort out before you order: the 8F35 has two parts people call a sun shell. This one is part of the forward drum assembly at the front of the gear train. The other, Ford JM5Z-7A019-A, is the output planetary sun shell that Ford lists next to the output carrier in TSB 22-2281. If your failure is the output planetary, look at the JM5Z-7N473-C output planet carrier instead.

What the sun shell does in an 8F35

Torque leaves the converter turbine on the input shaft and turns the forward drum. The drum houses a clutch pack and its apply piston, and the sun shell welded to the drum carries that rotation forward into the gearset it drives. Because the shell, drum and shaft are one rotating unit, a crack in the shell or worn drive lugs means the gearset behind it gets torque only some of the time, or not at all. Buying the three pieces already joined removes the guesswork of matching a separate shell to a used drum.

Symptoms of a failed sun shell or forward drum

• Loss of drive or flare in the gears that depend on the drum's clutch, often with a bang or clunk before it happens
• A cracked shell, broken lugs or stripped splines found when the unit is apart
• Metal shavings and burnt friction material in the pan and on the magnet
• Slip that returns soon after a rebuild that reused the old drum and shell
• Clutch slip codes from the transmission module once the clutch the drum carries can no longer hold

How to confirm you need this part

Many 8F35 complaints that feel like a broken internal part are covered by Ford bulletins with other causes. TSB 22-2281 blames slipping, harsh engagement and a list of clutch codes on worn needle bearings in the output planet carrier, and TSB 19-2386 traces P0766 and intermittent no reverse to separator plate contamination. Our 8F35 bulletin guide lays out which build dates and codes each one covers. If those do not fit your case, the forward drum and shell are confirmed on the bench: inspect the shell where it joins the drum, the drive lugs and shaft splines, the piston bore and the bushing journals, then air-check the clutch.

Fitment

This assembly is listed for the 2019-2024 Ford Edge 2.0L EcoBoost, 2020-2025 Escape 1.5L and 2.0L EcoBoost, 2021-2025 Bronco Sport 2.0L, 2022-2025 Maverick 2.0L EcoBoost, 2019-2022 Transit Connect 2.0L, 2019-2025 Lincoln Nautilus 2.0L and 2020-2025 Lincoln Corsair 2.0L. It is not for the Fusion, MKZ or MKC with the six-speed 6F35. Ford built the 8F24, 8F35, 8F40 and 8F57 as one family starting in 2019, so read the tag on the case and compare the JM5P-7F213-FA number, shaft length and spline count with the part you removed. If you are not sure, send us your year and VIN. Everything we stock for this unit is on the 8F35 parts page.

Install notes

• Fit new seals and sealing rings from an overhaul kit rather than reusing the old ones; the 8F35 master rebuild kit with filter, frictions and steels covers the drum's clutch pack too.
• Check the input shaft bushing surfaces in the pump stator. Ford's TSB tells technicians to replace the pump and converter if that bushing is worn and converter clutch codes were stored.
• Flush the converter and back-flush the cooler. Metal left in either will come straight back to the new drum.
• When closing the case, Transmission Digest recommends a turbine shaft seal protector and a tool to hold the pump drive gear and chain, so the chain does not drop out of place as the converter housing goes on.
• A 307-769 bench mount fixture holds the case steady while you set the drum and gear train.
• Fill with Motorcraft Mercon ULV only, then reprogram or reset adaptives. Shifts may feel firm for a few days while the strategy relearns.

The drum is a mechanical part and needs no programming of its own. Like every part we ship, it goes out from the USA and is covered by our 1-year warranty.

Is this the sun shell from Ford TSB 22-2281?

No. The bulletin lists JM5Z-7A019-A, the output planetary sun shell, with the output carrier. This is JM5P-7F213-FA, the forward drum with its sun shell and input shaft attached.

Do I get the drum and input shaft, or only the shell?

You get all three as one assembly: the loaded forward drum, the sun shell joined to it and the input shaft. It is used OEM Ford, cleaned and inspected.

Will it fit an 8F24 or a Fusion?

It is listed for the 8F35 only. The Fusion, MKZ and MKC use the six-speed 6F35 and it does not fit them. Check your case tag, or send year and VIN and we will confirm.

What should I replace at the same time?

Seals, frictions and steels for the drum's clutch, the filter, and any bushings that show wear. Flush the converter and cooler so old debris does not reach the new parts.

What fluid goes back in?

Motorcraft Mercon ULV. Ford calls for it in the TSB parts list for this transmission, and Mercon LV is not a substitute.

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