Section 7: A4LD, 4R44E, 4R55E and 5R55E Transmissions
A smaller version of the E4OD
These four and five-speed transmissions are used in four cylinder and V-6 applications (primarily the Ranger and Explorer) and have evolved as outlined in the "Alphabet Soup" chapter. The A4LD was derived from the C-3 three-speed automatic transmission by placing a two-speed overdrive unit in front of the original three-speed workings. As the names imply, the "E" transmissions are electronically controlled (similar to the AOD-E/4R70W transmissions), while the 5R55E is a five speed version currently used only with the SOHC 4.0L engine. The 4R44E is a light duty version of the electronic unit, similar to the old non-4.0L A4LD transmission.
For serious performance use, we recommend that you upgrade your vehicle to the heavy-duty 4.0L Ranger/Explorer version of these transmissions if it is not already equipped. Of course, the same transmission oil cooler and torque converter strategy used with the E4OD transmission applies here also.