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Unread 07-06-2010, 09:59 PM   #16
Jeepzcb09
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Quote:
Originally Posted by timberwolf0122 View Post
I bought my alternator from ebay used (30,000 miles), I paid $30+$12 shipping. According to the dash I am sitting pretty much on the 14V marker, I'll have to stick the multimeter in the lighter port and get a precise reading.

A 160A alternator will put out more power at any RPM range than a 90A (stock) alternator.
when idleing in just below the 14v mark and while driving im right on it with a stock alternator

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Unread 07-06-2010, 10:03 PM   #17
jake89yj
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dose this only fit right on the tj what about the yj ??
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Unread 07-07-2010, 12:50 AM   #18
bojang
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Quote:
Originally Posted by Guardian7 View Post
From 04-06 Jeep changed to a different alternator which was typically rated at 117 Amps, voltage output at idle should not change because this is controlled by the internal regulator, the real difference is how much amperage load it will handle at a given rpm to maintain acceptable voltage before alarms go off. If you run a winch you will exceed the amperage capacity of an alternator and draw the additional amps from the battery during a pull, once the amperage drain depletes the battery reserves voltage will begin to drop setting off the low voltage alarm. With more amperage capacity from the alternator your pulling less amps from the battery during a pull so the battery will drain less over the duration of a pull. Amperage draw specs for your winch can be found in the mfg specs and varies depending on load and how many layers (wraps) are on the drum. Here are the specs on a Warn 9.5ti Winch to give an idea how much amperage (current) the winch motor will draw off the electrical system. Any line pull over 2000lbs will max out a 160 amp alternator and begin draining the battery. This means anyone with a winch will benefit by upgrading the alternator.

Timberwolf0122, I've been looking through salvage yards for my 06 alternator upgrade but there are many different part #'s used on the Dodge trucks, could you please post the part number on your 05 upgrade? I'm not sure if my current part # is correct but I can cross reference them?

(136A Alternator from 97-98 ZJ, Dakota, Durango, Ram (PN:56027913) for 97-03 Wrangler)
(0406 Durango with 4.7/160A (PN:56029914AA), for an 04-06 Wrangler)

WARN 9.5ti Line Pull Lbs. to motor current load rating.
0 lbs = 47 amps
2000 lbs at layer 1 = 160 amps
4000 lbs at layer 2 = 230 amps
6000 lbs at layer 3 = 305 amps
8000 lbs at layer 4 = 370 amps
9500 lbs at layer 5 = 425 amps
I have a 160 amp in mine, and it is from an 04 Durnango, 4.7, so you should be good with the number you have. It will have an extra arm on it, on the top. Clearance around your coil pack could be very close, so you may need to cut that arm off. I didn't have to on mine, I have @ 1/8th" around it.
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Unread 07-08-2010, 12:41 AM   #19
Guardian7
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Thanks Chris, I think that extra arm was the reason I passed them up at the salvage yard.

Jake89, I don't have any info prior to 91 but keep researching it.

I found some additional info for 04-06 TJ upgrades:

160 Amp

2001-2005 Dodge Dakota (PN:56029914AA)
2001-2005 Dodge B.Series Van (PN:56029914AA)
.
.

Last edited by Guardian7; 07-08-2010 at 12:55 AM..
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Unread 10-24-2010, 09:56 PM   #20
RainingThunder6
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i need help finding a high output alt. for my 05 wrangler. does anyone have any advice?!
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Unread 10-25-2010, 05:07 AM   #21
Night Wolf
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Quote:
Originally Posted by RainingThunder6 View Post
i need help finding a high output alt. for my 05 wrangler. does anyone have any advice?!
uh, try actually reading the post directly above yours.....
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Unread 10-25-2010, 06:21 AM   #22
F9K9
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Quote:
Originally Posted by bojang View Post
I have a 160 amp in mine, and it is from an 04 Durnango, 4.7, so you should be good with the number you have. It will have an extra arm on it, on the top. Clearance around your coil pack could be very close, so you may need to cut that arm off. I didn't have to on mine, I have @ 1/8th" around it.
That's the exact model swap that I made in mine. While the coil pack looks close to being blocked in, it will easily come off when changing plugs.
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Unread 10-25-2010, 03:06 PM   #23
Knight-Rider
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I've done this swap to my LJ. I can run the headlights, the heater on high, the rear window defrost and front and back wipers. At idle, just over 14 volts.

Still at idle, with everything running,when my flex-a-lite fan kicks in, the lights dim for a split-second and my guage goes back up to just over 14 volts.

It is a definate improvement over the stock alternator, as I would show a voltage drop to 10 or 11 volts with the accessories running. This was before the electric fan, which I installed that at the same time as the alternator.
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Unread 11-04-2010, 09:26 AM   #24
Michele
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Got an aftermarket equivalent (56027913) from seller dbelectrical on
ebay and had my mechanic install it today (1997 TJ).
He swapped the pulley and the plastic connector from the old one
and it was a bolt in deal after that. The stock alternator in my TJ
was an 81 amp and wasn't cutting the mustard in the winter when
running the snowplow, lights, heat, and wipers in zero degree temps.
Already have an Optima yellow top so this should yield a nice
improvement.
pic of the new alternator:
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Last edited by Michele; 11-04-2010 at 10:44 AM.. Reason: added pic
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Unread 11-05-2010, 06:15 PM   #25
Wajoe
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Thanks for the write up, dual batteries on on my to do list so an alternator swap is too. I just have one issue to take up with you:

Quote:
Originally Posted by timberwolf0122 View Post

Safety 1st, safety 2nd, I disconnected the +ve lead from the battery and secured it out the way with the battery tie down, now my only danger was the scorching sun.
Safety 3rd, disconnect the negative terminal first! With the chassis being grounded, your wrench on the (+) terminal and the entire jeep have 12 volts potential difference. If you disconnect the ground first you have no reason to worry because the wrench and chassis are at the same potential. Once that's off THEN the hot lead can be safely remove without worry. I have a 9/16th wrench with a burn mark from a 24 V system that reminds me of this lesson every time I use it...
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Unread 11-23-2010, 09:14 AM   #26
EaglesSJ
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Just bought a 04 durango 4.7L for my 05 TJ. $90 online at advance auto using coupon code LS123
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Unread 11-30-2010, 12:55 PM   #27
leolufse
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Quote:
Originally Posted by EaglesSJ View Post
Just bought a 04 durango 4.7L for my 05 TJ. $90 online at advance auto using coupon code LS123
Did you get this installed yet? Did it fit okay?
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Unread 11-30-2010, 03:39 PM   #28
joe_jeep
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is there a factory option over 160 amp? like in the 200 amp area?
any ideas on smaller pulleys to overdrive the alternator for higher output at idle speeds?
what about dual 160 amp alternators?
thx
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Unread 11-30-2010, 06:45 PM   #29
EaglesSJ
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Quote:
Originally Posted by leolufse View Post
Did you get this installed yet? Did it fit okay?
yeah it fit perfectly and works great. plug and play install.
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Unread 11-30-2010, 06:59 PM   #30
-dirt-
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Does it have the extra arm?
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