The Ford 4R55E 4-speed automatic transmission was produced in the United States from 1994 to 2000 and was installed in several popular Ford models with both rear- and all-wheel drive. This transmission is a modernized version of the A4LD and was quickly replaced by the 5R55E.
Specifications
| Type | automatic transmission |
| Number of gears | 4 |
| Type of drive | rear / all wheel |
| Engine volume, l | up to 4.0 |
| Torque output, Nm | up to 450 |
| Recommended oil | ATF Mercon V |
| Oil capacity, liter | 9.5 |
| Replacing the oil | every 60 000 km |
| Replacing the filter | every 60 000 km |
| Gearbox lifespan, km | ~250 000 km |
Gear ratios Ford 4R55E
Using a 1996 Ford Explorer with a 4.0-liter engine as an example:
| Main | 3.270 |
| 1st | 2.474 |
| 2nd | 1.474 |
| 3rd | 1.000 |
| 4th | 0.750 |
| Reverse | 2.111 |
Using
The transmission was installed on:
- Ford Aerostar 1 (VN1) in 1994 – 1996;
- Ford Explorer 2 (U105) in 1994 – 1996;
- Ford Ranger 2 (PJ) in 1994 – 1997;
- Ford Ranger 3 in 1997 – 2000;
- Mazda B-series IV (UF) in 1994 – 1997;
- Mazda B-series V (UN) in 1997 – 2000.
Disadvantages of the Ford 4R55 gearbox
- This automatic transmission works great with engines up to 3 liters, but not so well with more powerful ones;
- High torque quickly breaks the brake band and wears out the clutches;
- Frequent overheating aggravates the situation, contributing to the destruction of this otherwise good transmission;
- The valve body is often sent in for repairs, as friction dust clogs the solenoids.
