5R55S Clutch Drum 2002, remanufactured and ready to install. Fits the 5R55S. Ships fast from the USA.
A 5R55S that flares into 2nd, slips in 5th on the highway, or shows a glazed, burnt overdrive band at teardown usually needs more than a band. The drum that band clamps onto takes the heat too. This is the 2002-and-later style 5R55S overdrive drum, supplied as a set: the drum, the 38-tooth overdrive sun gear and the thrust washer. It has been taken apart, cleaned, washed, checked for cracks and damage, and the band surface has been resurfaced smooth so a new band grabs the way it should. It suits the Lincoln LS, Ford Thunderbird and V6 Mustang owner, or the shop rebuilding one of those units.
The 5R55S is a five-speed rear-wheel-drive unit that shifts by applying two bands and three clutch packs in combination. The overdrive band wraps this drum and is applied in two gears: 2nd, together with the forward clutch, and 5th, together with the forward and direct clutches. The coast clutch lives inside the drum and is part of reverse. The sun gear bolted into the drum is the S-specific piece. Sonnax identifies the S by its 38-tooth overdrive sun gear, while the W uses a 24-tooth gear, and that tooth count is why the S runs a 2.29 second gear and a 0.71 overdrive. ATSG has also documented that the coast clutch drum carries lube oil from the front pump toward the overdrive planetary, so a drum with a worn bore or damaged seal surface can starve the planets downstream.
The most common reason a 5R55S burns its overdrive band is not the drum at all. Sonnax explains that as the servo pin bores in the case wear, apply oil leaks past the pin and release oil cross-leaks, so the band applies soft and slips. A new drum will not fix that. Check the fluid, pull codes, and match the slip to the gear: slip only in 2nd and 5th points at the overdrive band, its servo and this drum, while slip in every forward gear points at the forward clutch drum, which is a different part we also stock as the 5R55S forward clutch drum. Our servo pin bore wear guide and 5R55S slipping causes and fix walk through it.
This drum set is for the 2002-and-up 5R55S geartrain with the 38-tooth overdrive sun gear. Per Sonnax, Lincoln LS and Thunderbird used the 5R55N through 2002 and changed to the S for 2003, and the S also went into later Explorer and Mountaineer models, which used the W before that. The N uses different hard parts and will not take this drum. Earlier units with a 24-tooth sun gear are not a match either. On teardown, count the teeth on your old sun gear and compare the drum lugs: this drum is built for two clutch plates with 0.320-inch wide lugs. If in doubt, send us the year and VIN. See every S, W and E part on our 5R55 parts page, and confirm your unit with the 5R55 identification guide.
| Fits | 5R55S 2002 |
| Part type | Clutch Drum |
| Condition | Remanufactured |
| 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.
Yes. It is supplied as the overdrive drum, the 38-tooth overdrive sun gear and the thrust washer, cleaned, crack-checked and with the band surface resurfaced.
Per Sonnax those models ran the 5R55N through 2002 and the 5R55S from 2003. The N uses different hard parts, so a 2002 LS or Thunderbird usually needs N parts. Send us your VIN and we will confirm.
Only if your W already has a 38-tooth overdrive sun gear. Sonnax identifies the W by a 24-tooth sun gear, and mixing tooth counts changes the 2nd and 5th ratios the computer expects, which can set ratio codes.
A new overdrive band, coast clutch seals and the seals and gaskets from a rebuild kit. Inspect the overdrive servo pin bore in the case, since a worn bore is the usual reason the band burnt.
Yes. Sonnax notes that Ford units built after 2002 use adaptive strategy and should get a relearn, so reset the adaptive values with a scan tool and drive through all five gears to let the computer learn the new parts.
