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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. Baumann Engineering will produce a Baumannator TCS version for these transmissions (useful for retrofit applications, as well as a means of tuning OEM equipped vehicles).
Baumann Electronic Controls, LLC
702 South Mechanic Street
Pendleton, SC 29670
Phone: 864-335-9365
Fax: 864-335-9055
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