My altenator died on my 93 f150 5.0, so I was going to do the 3G upgrade. I think the truck may already have a 3G, as it looks similar to photos I have seen online. How can I tell the difference? Also will a pulley from a stock altenator fit on a 3G altenator?

Thanks!

Jeff

 

2G has external fan.



3G



3G alternators
(1994-95) Ford Mustang 5.0L
(1994-00) Ford Mustang 3.8L
(1994-97) Ford Thunderbird, Mercury Cougar 3.8L
(1990-95) Ford Taurus, Mercury Sable 3.8L
(1993-99) Ford Taurus, Mercury Sable 3.0L
(1995-98) Ford Windstar 3.8L & 3.0L
(1991-94) Lincoln Continental 3.8L
(1992-97) Ford F Series Pickup
(1992-96) Ford E Series Van

 

The old 2G pulley will work on a 3G.

 

Can't get any closer than that on timing......

 

LMAO! Great minds think alike

 

Thanks guys,looks like i have a 3g, a bad one though!

 

did you have it bench tested? I'm not going to lie you can rebuild your alternator with quality parts for less than 1/3 the cost of a cheap chineese/mexico rebuild...

 

The only thing that really wears out is the VR assembly the bearings are pretty long lasting

 

Also there is two types of 3g alternators a large case and a small case. The small case has 4 holes in the cros ribs and the large case only has two holes like the above picture.

small case on the left large on the right http://www.supermotors.net/getfile/6...e/115_1530.jpg

 

There are 2 hole (large 148mm 130A) and 4 hole (small 135mm 95A)


There are 3 mounting styles. (side mount, 7" & 8 1/4" spread)



Quality bearings, rectifiers and regulators can also be found on Ryan's site. RJM Injection Tech — Alternator Accessories

 

Awsome guys thanks! Looks like u have a small case 95A 3G, I was actually thinking of just buying a new 160A 3G from RJM, i guess it should just hook right up

 

What the heck?! my Bronco is a 92 and i think it came with a 3G (i previously thought it had a 2G, but mine doesn't have an external fan and resembles a 3G a lot, it also came factory installed), that would be great news! . Does that means i should upgrade the cable?.

 

Factory installed 3G's shouldn't need a cable upgrade unless you are upgrading the 3G to one with much more amperage.
95->160A would definitely qualify

The major issue is that the 2G harness can't begin to take the current that a 130A alternator can put out, nor is it fused. If the regulator went in the 3G it could melt the 2G trucks wiring harness.

 

Looks like i may need the alt ASAP and cant wait for shipping, what vehicle would the 130A sidemount come from? Hopefully one of the parts stores has one in stock

 

Later E or F series with a smallblock.