The 2006 Ford Expedition uses a five‑speed automatic transmission (Ford’s 5R55S) paired with the 5.4-liter V8 engine. It is an automatic with overdrive, not a manual transmission or CVT.
Transmission type and model
Key technical details about the Expedition’s transmission in 2006 are summarized below.
Key identifiers
- Configuration: automatic transmission with overdrive
- Number of forward gears: 5
- Model designation: 5R55S
- Drive configurations: used in both rear‑wheel drive (RWD) and four‑wheel drive (4x4) variants
The 5R55S is a traditional 5‑speed automatic designed to handle the torque of the 5.4L V8 and to operate across the Expedition’s RWD and 4x4 platforms.
Maintenance and practical notes
For longevity, owners should follow Ford’s recommended automatic transmission maintenance schedule and use the proper ATF fluid. Regular checks help prevent issues such as shifting problems or fluid leaks.
- Check the transmission fluid level when the engine is warm and the vehicle is on a level surface.
- Use the correct type of automatic transmission fluid as specified by Ford for the 5R55S.
- Adhere to Ford’s service intervals for transmission service, which vary based on driving conditions and mileage.
- Be alert for symptoms such as delayed engagement, hard shifts, slipping, or unusual noises, and have them diagnosed promptly.
Proactive maintenance helps keep the 5R55S in smooth working order in daily driving and heavy-duty use.
Summary
In short, the 2006 Ford Expedition runs a five‑speed automatic overdrive transmission, the 5R55S, paired with the 5.4L V8. It is available in both rear‑wheel drive and four‑wheel drive configurations and requires standard automatic transmission maintenance to remain reliable.