UPDATE: hi-amp alternator swap - Page 2 - JeepForum.com
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post #16 of 76 Old 01-11-2010, 08:07 PM
wtroger
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This what I was able to find. It looks like they moved the Alternator up top in 2001
1999 & 2000's used the same mounting but changed to a plug on the back instead of bolt on.
1998-97) Dodge B Series Van, Dakota 3.9L, 5.2L, 5.9L
(1998) Dodge Durango 5.2L, 5.9L
(1998-97) Dodge Ram Pickup 3.9L, 5.2L, 5.9L, 8.0L
(1998-97) Jeep Grand Cherokee 5.2L, 5.9L
Replaces Chrysler 56027913, Nippondenso 121000-417
Lester Nos 13742 136 amp

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post #17 of 76 Old 01-21-2010, 08:49 PM
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My '03 took a 160a alternator that would fit an 04 Durango 4.9l. Bought it from autozone. The part number is 12328 (both autozone's and worldwide's number).

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post #18 of 76 Old 01-22-2010, 08:12 AM
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Quote:
Originally Posted by joeskyline06 View Post
maybe a dumb question...but did you notice your lights being any brighter?
They won't be any brighter as it is still a 12 volt system. To make them brighter you will either need to increase the voltage or the watts of the bulb. In our case you can only increase the watts. A larger alternator will support more items needing that 12 volt source.
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post #19 of 76 Old 01-22-2010, 10:39 AM
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my 98 TJ 2.5L has at least an 170amp alternator off of a 96 Dodge 2500 Diesel. all I had to do is change the pulley and cut the tab in the insolator. (looking back i could have reused the jeeps insulator)

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post #20 of 76 Old 06-08-2010, 11:46 AM
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Late reply to thread, but so many on this subject this one seemed most appropriate.

I read in several threads that some folks wondered about the 04/05/06 TJ fit.

I can verify that the 12328 part number from an 04 Durango is a direct bolt-on/plug in replacement for an '05 TJ. Price was $120 after core return at Advanced Auto.

The extra little "wing" on the alternator does contact the coil pack for the fowardmost spark plugs, but not by much....I suppose it could be cut off but I didn't bother.
E-fan on high doesn't affect the rest of the electrical as it did before.
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alternator2.jpg   alternator3.jpg  

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post #21 of 76 Old 06-08-2010, 01:03 PM
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Nice bloody knuckle dude. LOL.
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post #22 of 76 Old 06-09-2010, 12:22 AM
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Quote:
Originally Posted by greenrover View Post

The extra little "wing" on the alternator does contact the coil pack for the fowardmost spark plugs, but not by much....I suppose it could be cut off but I didn't bother.
Mine does not touch, probably about an 1/8th inch all the way around.

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post #23 of 76 Old 06-09-2010, 04:56 AM
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Love the bloody knuckles.

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post #24 of 76 Old 10-11-2010, 02:49 PM
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Could anyone tell me if the Durango alternator provides any additional current (relative to stock alternator) at idle speed?

On most off-road trips I've done, I tend to spend a lot of time idling. The longer I idle, the weaker the battery seems to get. I say that mainly because the engine will idle kind of rough after being on the trails all day. And the engine is slower to crank. I'm not sure if it's because the alternator is going bad, or because it's just not designed to create much current at such a low RPM. I have no problems under normal driving conditions.

I realize this is an old thread - I got here by following a link in the TJ FAQ. I figured other people might come to this thread wondering the same thing about amperage at idle, so I thought this would be a good place to ask the question.

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post #25 of 76 Old 10-11-2010, 03:34 PM
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In answer to your Q, I would guess not. I am finding that at idle my HO alt doesn't put out much and I also have heavier cables as well as a High end battery, but as soon as my foot touches the gas pedal ever so slightly to raise the rpm, the headlights immediately go brighter. I think at idle they are just not designed to put out that much. When I bought my alt it came with a spec sheet to tell what amps it produces at what rpm. I will see if I can find it, I know I posted it somewhere!

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post #26 of 76 Old 10-11-2010, 03:48 PM
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Read first sheet carefully:





These specs are for my alt. Not the durango one, but you can see how things change based on rpm. Like I said, My headlights brighten up significantly at the slightest rise in rpm. Good luck on your ventures.

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post #27 of 76 Old 10-11-2010, 04:23 PM
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Rich - good info, thanks a lot for posting that! Looks like the current output at engine idle speed is pretty much worthless.

So rather than looking into a different alternator, I suppose I should find a way to manually adjust/increase my idle speed....maybe by installing a hand throttle or something.

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post #28 of 76 Old 10-11-2010, 04:31 PM
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Just raise your idle speed slightly! LOL


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post #29 of 76 Old 10-11-2010, 05:29 PM
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Quote:
Originally Posted by ageorgakis View Post
Just raise your idle speed slightly! LOL
Yeah I would just want it around 1,000-1,100 rpm, and only during periods of time that I need to let it idle for up to 5 minutes. If I know it'll be more than 5 minutes, I'd just turn off the engine.

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post #30 of 76 Old 10-11-2010, 06:29 PM
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Yeah 23 amps or so at idle is weak, specially with the sound system and all the amps I am running. Good thing I dont run at idle much.

Rich G. 2005 Wrangler 4.0 6-Speed.
just4effect 10" single sub, enclosure and amp 4 sale. PM me if interested, local only
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