When internal sealing rings wear or crack, hydraulic pressure escapes the circuits it was never meant to leave, and that pressure loss shows up as slip, late apply or erratic line pressure long before the transmission fails outright. This set of 8 sealing rings targets that problem directly for the 5R55W, 5R55S and 5R55N automatic transmission, covering the seal positions that see the most wear across those three related units.
The set breaks down by material because different bores in this transmission demand different ring behavior. The 2 Peek-Metal rings handle locations where a rigid, low-deformation fit is needed. The 3 Teflon rings go where conformability matters and where a softer material reduces groove wear over time. The 1 Quantum ring fills a specific circuit that neither of the other two materials is suited for. Using the right material in each position is what keeps the seal effective after the unit is back in service.
This is a sealing ring listing only. It does not include clutch packs, steels, an Automatic Transmission Filter, a gasket set, a band or any other rebuild component. If your job calls for any of those parts, they need to be sourced separately. Checking your parts list against what this SKU covers before placing the order will prevent a return.
Each set is assembled at the REMCO facility, which has been working exclusively in automatic transmissions since 1991. The rings are counted and verified against a parts checklist at the time of packing, and that checklist ships inside the box. Item weight is 0.2 lb. Application runs from 1999 and up for units coded 5R55W, 5R55S or 5R55N. Confirm the code stamped on the unit before ordering.
- Stop internal leakage at the source: these sealing rings address pressure loss that leads to slip, harsh shifts or delayed engagement in 5R55W, 5R55S and 5R55N units.
- This listing covers sealing rings only. It does not include clutch discs, steels, Automatic Transmission Filter, gaskets, bands or any other rebuild components. Verify your parts list before ordering.
- Eight rings in three distinct materials: 2 Peek-Metal, 3 Teflon and 1 Quantum ring, matched to the specific seal locations in this transmission family. Each ring type serves a different bore and pressure circuit.
- Set contains 8 rings total. Peek-Metal: 2, Teflon: 3, Quantum: 1. Item weight is 0.2 lb. Assembled and verified against a parts list at the REMCO facility before shipping.
- Before ordering, confirm the exact transmission code on the unit tag: 5R55W, 5R55S or 5R55N. Also confirm the production year falls within the 1999-and-up application range covered by this set.
What's in the box
- 1 x Ring Kit, 5R55N 8-Rings [2-Peek 2-Metal 3-Teflon 1-Quantum] SW
Compatible vehicles
- Fits Mustang [05-10], Thunderbird [02-05], Explorer [02-10], Explorer Sport Trac [05-10], S-Type [00-02], XK8 [01-02], XKR [00-02], Aviator [03-05], LS [00-06], Mountaineer [99-01].
| Ring Kit 8-Rings (2-Peek 2-Metal 3-Teflon 1-Quantum) 1999-Up 5R55N SW |
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