Three molded compressor fixtures that push down the clutch piston return springs on Ford 10R80 and GM 10L80 drums so the snap ring can come out.
This is a press-mounted set for the shop that does ten-speed clutch work with an arbor, hydraulic or foot press. It is three molded fixtures, each one matched to a clutch housing in the Ford 10R80, the transmission in the 2017-2023 F-150, 2018-2021 Mustang and 2020-2021 Explorer, and in the shared-design GM 10L80. Each fixture seats flat on the balance dam and return spring pack so the press load is spread all the way around, and the snap ring groove opens up without the dam tipping. If you have bent a spring cage, scratched a piston bore or had a snap ring fly across the shop using a socket or a pipe, this is the fix.
The 10R80 and 10L80 use rotating clutch housings with a piston, a stacked return spring and a balance dam held under a snap ring. The balance dam fills with oil as the housing spins and offsets the centrifugal pressure that would otherwise try to push the piston on by itself. To get the snap ring out, the dam and springs have to go down together and stay level. A generic plate or socket only contacts part of the dam, so it cocks, and that is how bores get gouged and rings get distorted. These fixtures are sized to their housings, so the dam goes down square under the press ram. The molded material is softer than aluminum, so it will not mark the housing or a sealing surface if it moves.
A press set only earns its money once you know the problem is inside the case. Check fluid level and type, scan for codes in every module, and work through the hydraulic and electrical checks in our 10L80 pressure control solenoid guide and the 10L80 pump failure guide, since low line pressure produces the same slips a bad clutch does. Once the unit is apart, Sonnax recommends air checking each drum with its mating part. Sonnax also lists internal sealing ring and bushing wear as a common cause of slipping, slide bumps, neutral conditions and ratio codes, so check those before blaming a piston.
Listed for the Ford 10R80 in the 2017-2023 F-150, 2018-2021 Mustang and 2020-2021 Explorer, plus GM trucks with the 10L80. The 10R80 also went into other Ford trucks and SUVs that are not on this listing, and GM made running changes to the 10L80 over the years. Match each fixture to its housing before loading the press. If you want us to confirm fitment, send your year and VIN. Every part we carry for this family is on our 10L80/10L90 collection page. The set measures about 9.3 x 3.2 x 9.1 inches.
For the clutch packs themselves, the 10L80 friction clutch module kit 35955KIT is the common pairing, and a full seal and gasket job is covered by the 10L80 overhaul kit for 2017-2022. Refill with MERCON ULV on Ford units or DEXRON ULV on GM, and run the adaptive relearn before delivery.
| Fits | Ford 10R80, GM 10L80 |
| Applications | F-150 2017-2023, Mustang 2018-2021, Explorer 2020-2021 |
| Pieces | 3 |
| Material | Molded plastic (non-marring) |
| Use with | Arbor, hydraulic or foot press |
| Size | 9.3 x 3.2 x 9.1 in |
It is listed for the Ford 10R80 in the 2017-2023 F-150, 2018-2021 Mustang and 2020-2021 Explorer, plus GM trucks with the 10L80. Match each fixture to its housing before pressing, or send us your year and VIN to confirm.
The fixtures are made to be used under an arbor press, hydraulic press or foot press. Center the fixture on the spring retainer and dam, apply light steady pressure until the snap ring groove is exposed, then release slowly.
They are molded to spread the load across the whole dam rather than concentrate it, and the material is chosen so it will not scratch aluminum housings. Use only enough pressure to unload the snap ring and they are meant for repeated rebuilds.
Piston seals, frictions and steels as needed, and the rotating sealing rings on the shafts, which ATRA says must be replaced on every 10L rebuild. A friction clutch module kit and an overhaul kit cover most of it.
Yes. Clear the shift adapts and run the adaptive learn with a scan tool that supports it, then drive through all ten gears so the module can learn clutch fill and clearance again.
