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Old 08-12-2007, 02:03 PM   #1
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alternator?

so from what I've heard on the thread is that a good switch for the alt is the dodge durango one. is this true? if so is it a direct bolt-on? I've been hearing that when I put my winch on and need to use it the alt isn't going to charge fast enough on my rig so upgrading is a good idea. what size output do I have on mine right now? (2.5L) and how much more amps is the durango one give me?
thanks,
-Fox-

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Old 08-12-2007, 02:27 PM   #2
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I've heard a stock jeep cherokee ~140 amp alternator is a bolt on.. the only difference is the + cable holder.. instead of it being to the side going back it sticks out straight. let me see if i can find u linky.


clicky linky... http://www.bc4x4.com/tech/2004/jeepalt/

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Old 08-12-2007, 02:34 PM   #3
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according to those people the 97vs 98 alternators are different..

http://bigredheep.com/postt3543.html

update.. last post ^

Posted: Sun Mar 06, 2005 11:35 am Post subject:

--------------------------------------------------------------------------------

I tried the 98 durango alternator on my 2002 4.0l tj sport and it did not fit. Clocking of mounts, sliding bushing VS my sliding nut, 7 rib pully (minor issue). I bout it for 40 dlls, and gave it to my inlaw in Tijuana wich owns a 98 durango, it will serve him in he future.

I continued my search and found, with the same bone yard, a 99 grand cherokee 4.0l aternator. it fits perfectly, same mounting tab clocking and everything. The Grand and my 2002 TJ chare the same belt copnfiguration and even a 6 rib pully. The othe r difference was that the Tj comes with a 117 amp "denso" unit and the Grabd with a "BOSH" unit. I again paid 40 dlls. Additionally, my alternator is located on the left side of the engine, but on top. not like my old cj7 and myinlaws 86 yj, that are mounted on the bottom (left side again, "as you face your engine).

You might say 117 amps should have suficed, but 19 amps more with a mere 40 dlls. Ill buy that for a dollar. Also I have a battery isolator and a red and a blue top optima HOME MADE set up mimmicking an after market set up, they wanted 160 dlls for it, I spent 20 dlls on steel, and approx 8 hour making.


Good luck with your install.
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Old 08-12-2007, 02:44 PM   #4
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ya and they also dont specify if it will work on the 4cyl
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Old 09-17-2007, 05:29 AM   #5
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Bump-
ok guys, I decided that a new/rebuilt alt is in order, I would perfer to just upgrade to something like 130w or 150w. I would like to know what other vehicles are compatible with my 2.5L, having the winch and soon to be running 8 lights including my driving lights. I need something that is gonna put out. help?
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Old 09-17-2007, 01:46 PM   #6
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I did a bunch of research on this before... lemme see what I can dig back up for ya.
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Old 09-17-2007, 01:58 PM   #7
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Fox - your 98 2.5L has a stock ouput of 90amps, same as the 4.0L from that year.

The 90amp was used from '91 to '98 on the 2.5L and 4.0L Jeeps(TJ, XJ). The ZJ, for some reason is a completely different mounting system. I found that out the hard way when we had to replace it on my sisters ZJ.

So anyway, you need the 136Amp alternator off a 98-99 Dodge Ram with a 3.9L V6, 5.2L or 5.9L V8. Reason being is that it is also externally regulated so your system will work with it. It has all the same mounting bolts and its positioned the same. The only difference is that it has a 7-rib pulley, and the stock is a 6-rib. No problem as you can just push your belt all the way to the back of the pulley without any issues, or swap the pulleys.

http://www.vicic.com.tw/alternators/gvdn11361204.htm
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Old 09-17-2007, 02:02 PM   #8
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Quote:
Originally Posted by Triple88a View Post
I've heard a stock jeep cherokee ~140 amp alternator is a bolt on.. the only difference is the + cable holder.. instead of it being to the side going back it sticks out straight. let me see if i can find u linky.
Cherokee's never had a 140Amp alternator. XJ's & ZJ's only had 90amp and 117amp, same as TJ's... ZJ's with V8's had 120amp and 136amp alternators. And even the mounting is different between ZJ and XJ alternators. Get your info right, because false info might burn someones car down.
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Old 09-18-2007, 10:39 PM   #9
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thanks AZ I will be doing this swap this week. well... hopefully if I have time.
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Old 09-18-2007, 11:21 PM   #10
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Just go all out! Mean Green 200 Amp rox, baby!

Stock alt from an 03 TJ next to 200Amp Mean Green...
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Old 09-18-2007, 11:25 PM   #11
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Quote:
Originally Posted by AzTJ View Post
Cherokee's never had a 140Amp alternator. XJ's & ZJ's only had 90amp and 117amp, same as TJ's... ZJ's with V8's had 120amp and 136amp alternators. And even the mounting is different between ZJ and XJ alternators. Get your info right, because false info might burn someones car down.
What is the meaning of the ~ sign?

i'm going off the "write up" some one did. http://www.bc4x4.com/tech/2004/jeepalt/
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Old 09-18-2007, 11:35 PM   #12
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Just go all out! Mean Green 200 Amp rox, baby!

Stock alt from an 03 TJ next to 200Amp Mean Green...
ya but the price tag is killer. I just need something bigger than my stock one. just gonna go to pick and pull for a replacement. if I can find a mean green for a good price then I will get it but just can't find the $$$ to do it right now.
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Old 09-18-2007, 11:37 PM   #13
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What is the meaning of the ~ sign?
I know that it mean "about" but 117 is quite a ways from 140.
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Old 09-18-2007, 11:51 PM   #14
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hey AZ is 136 gonna be enough output? if I'm runnin the 9000i, 6 lights and other crap on the heep?
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Old 09-18-2007, 11:58 PM   #15
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I'd say its plenty... but if your having problems after the install, you have too much crap
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Old 09-19-2007, 12:15 AM   #16
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but Scout said the one with the most stuff wins I don't think I'll ever have enough crap...like a java addict...I always need more am I gonna have to upgrade the positive wire for the battery hook-up? I was looking into some of the sites about using other alts and they said something about doing this.
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Old 09-19-2007, 12:59 AM   #17
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eh, Scouts opinions don't mean anything

I wouldn't think so, but it wouldn't hurt... although it might be a smart idea to replace the cables with new ones while your in there, as they more than likely have some corrosion in them. Being 9 years old and all.
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Old 09-19-2007, 02:30 AM   #18
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ya good point, on both accounts

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