5R55S Banner Rebuild Kit 2008, new and ready to install. Fits the 5R55S. Ships fast from the USA.
If the 5R55S in your 2008 Explorer, Mountaineer or V6 Mustang now slides into gear, flares between shifts or loses engine braking, and the fluid smells burnt, the clutch packs are usually the place to start. This banner kit covers the soft parts of that rebuild. It is catalogued as a Raybestos kit, part number W16004GAP, for 2008-up 5R55S and 5R55W units, and it ships as a complete overhaul kit with a bonded piston plus a full set of clutch frictions: five double-sided high-energy direct frictions with 48 teeth (R560107), five forward frictions with 89 teeth (R560100) and two high-energy overrun frictions with 16 teeth (R560020).
Each clutch pack in the S is applied by hydraulic pressure that the solenoid body meters through three variable force solenoids, as Transmission Digest describes. The PCM learns how long each pack takes to fill and adjusts as the frictions wear and the piston seals start to leak. Eventually it cannot add enough pressure and the unit slips. This kit attacks both sides of that: the overhaul set reseals every circuit (gaskets, seals, O-rings, sealing rings, lip seals and rubber parts) and the twelve frictions restore the forward, direct and overrun packs. The bonded piston replaces a part whose rubber seal hardens and bleeds apply oil.
The kit lists no steel plates, no bands and no filter. Reuse steels only if they are flat and not heat-blued, and inspect the bands. If either is worn, the 2008-up 5R55S master rebuild kit bundles those parts.
Sonnax points out that on the W and S, worn valve body bores, especially the VFS modulator bores, can drop clutch and servo pressure enough to set ratio codes, and that the solenoid pack often gets blamed for problems that start elsewhere. Clean red fluid and a clean magnet mean the hydraulic side deserves attention first; our 5R55 harsh or delayed shift walkthrough lays out the tests and the 5R55S slipping causes guide covers what else to rule out. If the issue is a worn valve body or failing solenoids, a 5R55S solenoid kit may solve it without a teardown.
This page is the 2008 version, and the kit itself is catalogued for 2008-up 5R55S and 5R55W transmissions. It is not the same kit as the 2002-2007 version, which uses a different friction module, so do not mix them by price alone. Before the old frictions go in the scrap bin, count their teeth: 48 on the direct, 89 on the forward and 16 on the overrun should match the plates in this kit. Confirm the transmission code on the door-jamb label and the case tag, or send us your year and VIN. Earlier trucks should use the 2002-2007 5R55S banner kit, and the full family is on our 5R55 parts page.
| Fits | 5R55S 2008 |
| Part type | Banner Rebuild Kit |
| 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.
Twelve frictions: five 48-tooth double-sided direct plates, five 89-tooth forward plates and two 16-tooth overrun plates, plus the overhaul seal and gasket set with a bonded piston. No steels, bands or filter are listed.
Yes. The 2002-2007 kit uses a different friction module. Match the tooth counts on your old frictions and the year of your transmission before ordering.
The kit is catalogued for 2008-up 5R55S and 5R55W units. Most 2008 vehicles carry the S; check the door-jamb transmission code to be sure.
Mercon V. Fill through the check plug and set the level hot, since the 5R55S has no dipstick.
The PCM is still using the old adaptive values from the worn clutches. Clear them with a scan tool and complete a relearn drive so it adapts to the new frictions.
