5R55S Pump 2002, remanufactured and ready to install. Fits the 5R55S. Ships fast from the USA.
A Lincoln LS, Thunderbird, Explorer or Mustang with a 5R55S that is slow into gear, whines at idle or loses pressure when hot does not always need a complete pump. When the rest of your pump checks out, this remanufactured pump face for 2002-and-later 5R55S and 5R55W transmissions lets you replace the worn section for far less. It came out of a Lincoln application and has been cleaned, inspected and had worn parts replaced. What you receive is the part shown in the photo, so compare it closely with yours.
The front pump on the S and W is built from more than one machined section, and ATSG refers to a pump plate that its valve sleeve seals against. The converter hub spins the gears, and the passages machined into these sections carry oil to the regulator, the solenoid body and the converter. One of the most important passages feeds the line pressure relief and flow control valve, whose sleeve seals against the pump plate with a very thin O-ring. ATSG notes that this O-ring barely stands above the pump surface, so warped, nicked or worn mating faces let pressure bleed straight back to the suction side. That is why the condition of the face matters as much as the gears.
Put a gauge on the pressure taps first. ATSG found readings of 40 psi or lower when the flow control valve was stuck or its O-ring was leaking, and at that point the fix is in the pump. If pressure is normal at idle but drops under load, look at the valve body and the pressure control side. Our 5R55S pump failure symptoms guide separates pump wear from regulator and solenoid faults, and Lincoln owners should also read why a 5R55S Lincoln LS won't move.
This pump face is listed for 2002-and-later 5R55S and 5R55W transmissions. Be careful with early Lincolns: Sonnax says the 2000-2002 Lincoln LS and Thunderbird used the 5R55N, and the S replaced it in 2003. Only a few N parts interchange with the W and S. A 2002 LS therefore almost certainly has the N, so check your transmission before you order. In Explorers and Mountaineers, the W ran in 2002-2003 and the S took over for 2004-2005. Hold the photo up to your old pump and compare the bolt pattern, the passages and the plate, or send us your year and VIN. If your pump body or gears are also damaged, the remanufactured 5R55S complete front pump is the better choice. More parts are on the 5R55 transmission page.
| Fits | 5R55S 2002 |
| Part type | Pump |
| 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.
No. It is the pump face section as pictured. If your pump body or gears are scored, buy a complete pump assembly instead.
Probably not. Sonnax lists the 2000-2002 LS with the 5R55N, which shares few parts with the S and W. Confirm your transmission code or send your VIN before ordering.
It is listed for 2002-and-later 5R55S and 5R55W, and the 2004-2005 Explorer used the S. Compare it with your old part to be sure.
Mercon V. Prime the pump with it and set the level through the check plug in the pan at operating temperature.
If a gauge shows 40 psi or lower and the flow control valve or its O-ring seal at the pump plate is the cause, a good pump face plus a new O-ring and sleeve check addresses it. Test first.
