In 1999 Ford Motor Company switched from using the large case 3G series alternator on the 7.3L Power Stroke Diesel to the small case 110 amp 6G series alternator. After 1999 Ford no longer offered the large case alternator upgrade option for Power Stroke diesel equipped vehicles. The small case 110 amp 6G series alternator that comes standard on the Power Stroke Diesel since 1999 has been plagued with reliability issues, the component that most often fails is the Bridge Rectifier. Upgrading the small case unit to a higher amperage just compounds the problems.
Quick Start offers the Solution with our unique Large Case alternators with top quality components and an Extra Heavy Duty Bridge Rectifier which helps solve Output and Reliability Problems of the small case unit on the Ford F Series, E series, Excursion, and other Ford Trucks with the Power Stroke Diesel and on Ford Super Duty Trucks and others with the Power Stroke Diesel motor. The better choice is to upgrade to our Large Case High Output Power Stroke 6G Series Alternator for your power needs. Get more power at idle speeds, Plus the Large Case 6G Series alternator is much more reliable at higher outputs. Great alternator for powering your alternative energy system, Winches, Stereo, Trailer, Off-roading and more on the Ford Power Stroke Diesel. We also have many High Output Alternators for other Ford Family vehicles with the Gas motor as well.
Before 1999, F Series Trucks, Excursion, and E Series Diesle applications used the large case 3G Series Alternator. The large case 3G was a great improvement to its small case brethren. It had more mass for cooling, less current loss, higher output when hot, and improved idle output.
The 3G Series large case high output alternator can be used to replace the 3G Small Case Alternator, upgrade a 3G Series alternator to a higher amperage, or upgrade from a 3G Series Small Case.