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98 TransAm Alternator issues, help?

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Old Aug 9, 2009 | 02:32 PM
  #21  
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From what i've read the pulsation issue happens around 6 times out of 10 for all ls1 owners. It happened to my hawk and i just replaced it with a brand new Cardone alternator and the pulsation completely halted. If i were you i'd drop the stock shitpile and go new so you dont have that problem again.
just my .02
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Old Aug 10, 2009 | 09:19 AM
  #22  
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Hopefully I do not have the issue anymore with the rebuilt one. Tried a remanufactured one once but the main power post was screwed up. talking to the place that rebuilt mine and they said a lot of places that remanufacture them use cheap stuff from china. My place only uses made in USA stuff.

John
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Old Apr 20, 2010 | 09:10 PM
  #23  
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Question trans am charging issue

wow guys i am a new member to ls1 tech because of the postings you put on here for your t/a. my trans am is having the same exact issues as you posted .. thanks for the info i am going to try having my alt rebuilt by a local company here in kansas.. i have dvd screens and 3 amps for the audio in the car.. what amp rating should i have them build it at?
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Old Apr 20, 2010 | 10:36 PM
  #24  
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I bought a new alt about 1 month ago.. I have yet to put it in yet
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Old Jul 5, 2012 | 02:20 PM
  #25  
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i have a problem with my charging running around 14.5-13 volts when the secondary fan kicks on.changes out the alt.2 times went with a new one the last time and still doing it.replaced all the ends on the alt and batt.batt holds a load test at 700 cca.mine does it when the car heats up above 160* and now im so lost.can anyone help me
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Old Jul 6, 2012 | 01:11 PM
  #26  
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well still having the problem,changed all the end on the pos. and neg. cables and on the back of the new alt.just had a new batt put in and now its setting at 13.5 checked all the relays that makes the fan run when they kick on sometime it jumps down.tuen the head lights on then it comes back up but not everytime.could one of my fans couse this?it all stared couse my alt went out.
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Old Jul 6, 2012 | 01:22 PM
  #27  
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13.5 amps sounds plenty to me.. does the car start easily? What symptoms are you having? All I see you saying is that the amps drop when the 2nd fan kicks on which is normal because there's more draw, what else?
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Old Jul 6, 2012 | 02:17 PM
  #28  
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i just put another batt in it the guage jumps from 13.5-14.5 never did it till i put the alt on and thats my 2nd alt both did it.it just bugs me that its doing that and never has b4.maybe a grown wire?
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Old Jul 6, 2012 | 02:17 PM
  #29  
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car starts great every time no drag,alt puts out 14.0 just had it checked to.the guy that checked all said my volt guage is jumping around way to much.
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Old Jul 6, 2012 | 06:13 PM
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why has no one recommended a kg3 truck alternator yet??
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Old Jul 6, 2012 | 06:54 PM
  #31  
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some peeps think a truck alt is a waste
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Old Jul 6, 2012 | 09:39 PM
  #32  
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^^ don't see why? It fits perfect minus rear bolt and obviously what they should've have put from the factory. Fixed all my electrical problems.
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Old Jul 7, 2012 | 10:17 AM
  #33  
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hu i went threw 2 already hate to get another one.i drove it this morning with out the tops in it and it heated up where it should have,fans came on and the volt guage never moved.whats the chance its in the a/c controles or the compresure?is there a ground on the back of that alt,?thought about running a grown wire and start grounding stuff till it come alive.just a thought.cant see 2 bad alt. in one week.first one was reman the second one is brand new.
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Old Jul 17, 2012 | 03:05 PM
  #34  
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i just for go the underpowered stock alt and go get a used tahoe or escalade 120amp alt and never have to worry about it again. forgot the part code for it but i believe its a 2004 tahoe alternator that fits right in there with no modification. i had the same problem and when i did my K-member swap, i put it in there since i had to take it out anyway. Theres a writeup if not a sticky on it somewhere around here.
trust me, this route is way cheaper then going ot the parts store and getting an expensive underpowered alt when you can get a GM stock higherpowered Alt for cheap.

missed the post up top.
K3G is the part number.

Last edited by JoshuaGrooms83; Jul 17, 2012 at 04:23 PM.
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Old Jul 17, 2012 | 03:08 PM
  #35  
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here you go, found it
https://ls1tech.com/forums/generatio...ght=alternator
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Old Jul 17, 2012 | 04:17 PM
  #36  
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^^ smart guy
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