FORD/MOTORCRAFT ALTERNATOR LINEAGE
Ford’s original, separately regulated, alternator design, production versions were officially rated at 38 to 60 amps, although higher-output aftermarket versions are available.
Ford’s first integrally regulated alternator, originally produced in 65- and 75-amp models. Corrosion and resistance buildup in the power-wire connector caused high failure rates.
This integrally rated unit makes for the easiest retrofit into earlier vehicles. It corrects all of the 2G’s faults and uses internal fans for improved cooling.
Use those 3G variants that still have 180-degree-opposed mounting ears to replace earlier 1G and 2G alternators.
The 3G alternators are available stock in 95-, 130-, and 200-amp ratings.
The fourth-generation design includes several different case configurations, including the “pancake” version used with 1996–2002 Ford Mustangs equipped with Modular V8 engines. Very compact, it came stock with 150- and 200-amp ratings. No versions have 180-degree opposed mounting ears, so custom brackets would be required to use it on earlier engines and vehicles.
First used on some 1999 Mustangs and Crown Victorias, it can be found on the 2002–2004 four-valve Modular motors, 2005-and later SN197 Mustangs, and many other late Ford cars and trucks.
It’s available in 130-, 170-, and 200-amp ratings, but unique mounting ears make it hard to retrofit.
[ This is a compact “pancake” 4G alternator used with mid- to late-1990s DOHC 4.6 Modular V8 engines in Mustangs and Lincolns. Very compact and powerful, but like all post-3G Ford alternator models, it’s hard to retrofit because the shape and mounting configuration is unique to the chassis and engine they were installed on.