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General Forums => The Mess Hall => Topic started by: dragon51 on November 08, 2011, 02:06:28 PM

Title: 95 YJ Alternator Upgrade
Post by: dragon51 on November 08, 2011, 02:06:28 PM
My alternator in my 95 YJ has died. I have looked at list of options for a new higher output alternator , but I am unclear as to what ones will swap right over. And if not what do I need to do to make them work. I am very interested in the 160 amp ones. As everyone knows a winch really taxes a charging system.

BTW its a 4cy manual with no A/C, once I am done getting the alternator  back in I have a OBA york that will go back in the A/C spot.


I would greatly appreciate the help.

DJ
Title: Re: 95 YJ Alternator Upgrade
Post by: sharpxmen on November 08, 2011, 02:18:43 PM
i got a 136Amp Grand Cherokee in mine, $30 or something like that at the junkyard, direct swap just a minimal reconfiguration on the output prong but nothing major (the shield needs to be rotated that's all) - comes with the 8 groove pulley but can be used as is or replaced with the 6 groove one, i didn't bother swapping it. There's a good writeup in the FAQ with part numbers and all for various options, there is a 150 amp or so OEM listed in there that works on YJ, can't remember which vehicle comes out of but didn't find one at the time so i went with the GC one instead.
Title: Re: 95 YJ Alternator Upgrade
Post by: dragon51 on November 08, 2011, 05:00:50 PM
Thanks I will Check that out.
Title: Re: 95 YJ Alternator Upgrade
Post by: grumpygy on November 08, 2011, 05:47:38 PM
Got mine from E-bayreferbished and it looks great and works fine.
Title: Re: 95 YJ Alternator Upgrade
Post by: Jeffy on November 08, 2011, 07:36:47 PM
http://4bangerjp.com/forums/index.php/topic,400.0.html

If you want higher amps then you'l have to get a modded one.
Title: Re: 95 YJ Alternator Upgrade
Post by: jfrabat on November 09, 2011, 12:43:35 PM
I bought a Load Boss from Flea Bay about 5 years ago rated at 164A (more or less; dont rememebr the exact rating, but it was more or less around there) that has held on quite nicely to all the abuse I have thrown its way (getting buried in mud, winching, etc.).  Was not that expensive either.  Just remember to upgrade the wires if you go to a larger alternator; its quite likely that the stock wiring will not hold up to abuse if you are winching or similar...
Title: Re: 95 YJ Alternator Upgrade
Post by: dragon51 on November 09, 2011, 12:55:11 PM
jfrabat   I figured I would have to upgrade the wires to at least 4ga. Thanks I will have to look into that one as well.


That list of alternators does not tell me if they will work in my YJ other then the stock well duh. I sure hope it will work. My original question was and still is will any of those Higher Output Alternators work in my YJ as direct swap? I figured this is the one place I would be able to get a good answer since we all have 4 angry squires under the hood.
Title: Re: 95 YJ Alternator Upgrade
Post by: sharpxmen on November 09, 2011, 01:01:25 PM
jfrabat   I figured I would have to upgrade the wires to at least 4ga. Thanks I will have to look into that one as well.

you have to bypass the PDC, there are 2 x 50Amp fuses in there that will limit your current to 100Amp
Title: Re: 95 YJ Alternator Upgrade
Post by: dragon51 on November 09, 2011, 01:04:35 PM
Can I just use a lager fuse set? Or would it be better to run the power straight to the batter with a larger in line fuse?
Title: Re: 95 YJ Alternator Upgrade
Post by: jfrabat on November 09, 2011, 01:06:12 PM
you have to bypass the PDC, there are 2 x 50Amp fuses in there that will limit your current to 100Amp

If possible, you want to run welding cables...  They have more strands, and as a result, not only are they more flexible, but have less resistance and more electricity will get to the battery instead of getting wasted as heat.  Also, run as thick a cable as you can; it's better to have more capacity than you need!  In my case, I used 2 gauge, IIRC (or was it 0?), but left the stock wiring in place as well.
Title: Re: 95 YJ Alternator Upgrade
Post by: dragon51 on November 09, 2011, 01:14:56 PM
jfrabat  are you also jbolty on Jeep forums? I am also looking on their and your Jeep looks scary identical to the avatar on that forum.


I am going to take on this project in the future, I just need to get my Pig running for now my wife wants here car back. Lol So I am just going to put a 90 back in. I just want to get as much info as I can now, and a firm understanding of this and what alternators will work for me .
Title: Re: 95 YJ Alternator Upgrade
Post by: dragon51 on November 09, 2011, 01:25:45 PM
Now in the PDC could I just bump up the value of the fuse size with a pair of 60 or 70 amp maxi fuses, along with bumping up my wire size. I like the idea of using welding wire I was thinking about that.
Title: Re: 95 YJ Alternator Upgrade
Post by: jfrabat on November 09, 2011, 02:23:11 PM
jfrabat  are you also jbolty on Jeep forums? I am also looking on their and your Jeep looks scary identical to the avatar on that forum.

No, I am jfrabat there as well...  Same for Jeepz...

Now in the PDC could I just bump up the value of the fuse size with a pair of 60 or 70 amp maxi fuses, along with bumping up my wire size. I like the idea of using welding wire I was thinking about that.

I just left the stock wiring in place, and ran a new wire directly to the battery...
Title: Re: 95 YJ Alternator Upgrade
Post by: Bounty Hunter on November 09, 2011, 10:09:46 PM
The 136a alternator from fullsize Dodge trucks and vans is a direct bolt-in once you swap the pulley and plastic boot from your old alternator to the 136a unit.

I run a 160a unit in my '95 YJ, and ran an extra cable from the alternator output to the pos side of the battery.
Title: Re: 95 YJ Alternator Upgrade
Post by: dragon51 on November 10, 2011, 08:26:47 PM
So just run a extra pos wire what about on the neg side?  On that 160 amp. Did you have to make any mods to make it fit? 

Sorry for all the questions I always ask a lot on new things that I don't know about.
Title: Re: 95 YJ Alternator Upgrade
Post by: sharpxmen on November 10, 2011, 08:31:56 PM
So just run a extra pos wire what about on the neg side?  On that 160 amp. Did you have to make any mods to make it fit? 

Sorry for all the questions I always ask a lot on new things that I don't know about.


the ground is fine
Title: Re: 95 YJ Alternator Upgrade
Post by: Jeffy on November 10, 2011, 08:32:01 PM
So just run a extra pos wire what about on the neg side?  On that 160 amp. Did you have to make any mods to make it fit?  

Sorry for all the questions I always ask a lot on new things that I don't know about.

Just like BH said and what's in the link I posted.  You might also need to move the spacer in or out as well.
Title: Re: 95 YJ Alternator Upgrade
Post by: reddogg on November 10, 2011, 10:02:21 PM
I put the 160 on mine. Jeffy is right. All I had to do was adjust the spacer to make it fit. :thumb:
Title: Re: 95 YJ Alternator Upgrade
Post by: jfrabat on November 11, 2011, 11:32:46 AM
So just run a extra pos wire what about on the neg side?  On that 160 amp. Did you have to make any mods to make it fit? 

Sorry for all the questions I always ask a lot on new things that I don't know about.


Mine was a direct bolt on, and I bought the additional wire from them as well...