10R80 Reaction Shell 2017-2020, new and ready to install. Fits the 10R80. Ships fast from the USA.
If your 2017-2020 F-150, 2018-2020 Expedition, Navigator or Mustang, or 2019-2020 Ranger has reached the point where a software update and relearn no longer fix the harsh 3-4 shift, the flare into fifth or the bang into Reverse, the 10R80 is coming apart. This listing is built for that teardown. As pictured, it pairs new rotating drum hardware with a complete overhaul gasket and seal set and friction plates labeled for the A, B, C, D, E and F clutches, so the parts that wear together get replaced together instead of reusing a tired drum under new frictions.
GEARS Magazine describes the 10R80 as four planetary gearsets, six friction clutches and one mechanical one-way clutch working together to make ten forward ratios. The shells and drums are the housings that carry those clutch packs, hold the steel plates on their splines and transfer torque between the planetary members. Ford's own service names for the big rotating pieces are the CDF clutch cylinder (7H351), which houses the C, D and F clutches, and the clutch and planetary container cylinder (7B177). When a drum wears, its spline teeth notch, its bushing surfaces score or its sealing sleeve moves, and the clutch it carries can no longer apply on time no matter how good the frictions are.
A drum is a teardown diagnosis, so rule out the cheap fixes first. Ford TSB 23-2152 covers harsh engagement and harsh or delayed shifts on the 2017-2020 F-150 and 2018-2021 Expedition, Navigator and Mustang with a reprogram and an adaptive relearn. If codes and slips survive that, Ford's later TSB 24-2254 explains why: on units built on or before August 15, 2022 the CDF cylinder sleeve can move axially and leak apply oil, and the dealer test reads line pressure with a transducer while commanding individual clutches. Our 10R80 F-150 shift problems guide lays out that order of checks, and the 10R80 common problems guide covers the full list of known failures.
This version is listed for 10R80 transmissions from 2017 to 2020. In those years the 10R80 went into the F-150 from 2017, the Expedition, Navigator and Mustang from 2018 and the Ranger from 2019. The Bronco is not covered because it uses the lighter 10R60. Ford changed internal parts during production, so put your old drum next to the photo and match spline count, height and any stamped number before ordering, or send us your year and VIN and we will check it for you. The complete lineup is in our 10R80 parts collection, and a 2021-2024 transmission should use the 2021-2024 reaction shell instead.
Soak every new friction in MERCON ULV before assembly and measure each pack clearance rather than trusting stack height. The C, D, E and F pistons need a spring compressor, and the 10R80 clutch piston compressor tool kit makes that job safe. Inspect the pump, the sealing rings on the sun gear shaft and every bushing while the case is empty, because a new drum running against a scored shaft will leak just like the old one. Sonnax gives 13.0 quarts of MERCON ULV as the dry fill for a 2020 F-150 4x4 and warns that one quart too much causes overheating and venting, so set the level at 206-215 F. Flush or replace the cooler, as covered by the 2017-2020 10R80 transmission cooler, clear keep alive memory and complete the adaptive drive cycle before handing the truck back.
| Fits | 10R80 2017-2020 |
| Part type | Reaction Shell |
| Condition | New |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It is listed for 2017-2020 10R80 units, which includes the 2019 F-150. Ford revised internal parts during production, so compare your old drum with the photo and match spline count and any stamped number, or send us your year and VIN to confirm before ordering.
The listing photo shows rotating drum hardware, an overhaul gasket and seal set and friction plates labeled for the A through F clutches. Check the photos carefully against the parts you need, and contact us with your VIN if you want the contents confirmed for your build.
Not always. Ford TSB 23-2152 fixes many harsh engagement and harsh shift complaints with a software update and adaptive relearn. Replace drums only after pressure testing or a teardown shows leakage, worn splines or a moved sleeve.
MERCON ULV only. Sonnax lists a 13.0 quart dry fill for a 2020 F-150 4x4 and a check temperature of 206-215 F. Overfilling by about a quart can cause overheating and fluid venting.
Yes. Reset keep alive memory with a scan tool and complete the adaptive learning drive cycle. Shifts can feel firm for a few days while the module learns the new clutch fill times.
