Whining/Whirring Engine Noise - Page 3 - JeepForum.com

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post #31 of 37 Old 09-13-2013, 05:36 PM Thread Starter
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1999 XJ Cherokee 
Join Date: Sep 2013
Location: Baltimore
Posts: 125
Just want to let you guys know who have been helping me (if you even care haha), I swapped the 90 amp for a 136 amp alternator. Worked like a freakin' champ. Voltage drop with all of the lights is minimal (didn't test with winch) and she purrs like a kitten. If the alternator craps out I will switch her out, though I'm not thinking it will since the quality of the rebuilt parts from the local advance has always been good. Thanks guys for your input!

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post #32 of 37 Old 09-13-2013, 06:08 PM
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1995 YJ Wrangler 
Join Date: Nov 2009
Location: Schenectady
Posts: 1,182
When you can, remove the charging wire (the 6 or 8 ga wire coming from the alt to the PDC) and remove the 2 50 amp alt fuses from the PDC...

then get yourself a piece of 4 or 2 ga battery cable and run that from the alternator directly to the pos. terminal of the battery.... while you're at the auto store getting the piece of battery cable to do this, also pick up a 150 amp mega fuse... put that somewhere in the line.

now your system will charge better (heavier wire capable of handling the higher current of the bigger alt) and the system will be protected from possible over-charging - the wiring/fusing of the PDC is only wired for a 100 amp alt (for your formerly stock 90 amp alt)... you're now capable of 136 amps + or - so the 150 amp mega fuse will protect

Sean B. - Schenectady, NY - 95 YJ, 350/700r4/NP241, JB Shorty SYE, 8.8 rear, 2" BDS, 1" homebrew shackles, Daystar 1" BL, TJ flares, 35x12.50 General Grabber AT2 on 15x10 Bart D-Truckers, Polyshield polycarbonate windshield, HD over/under crossover steering
swap/build thread: http://www.jeepforum.com/forum/f22/a...hread-1542284/
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post #33 of 37 Old 09-13-2013, 06:22 PM
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1989 YJ Wrangler 
Join Date: Apr 2008
Location: Detroit
Posts: 22,473
That is great news! You have to love an off the shelf upgrade.
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post #34 of 37 Old 09-13-2013, 08:48 PM
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1992 YJ Wrangler 
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Location: Northumberland
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Glad i could help ya out

1992 YJ
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post #35 of 37 Old 09-24-2013, 03:58 AM
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1987 YJ Wrangler 
Join Date: Sep 2013
Location: Waianae
Posts: 33
Glad to see that your issue got fixed. Wish mine was that simple. Now it's been narrowed down to either the crankshaft or camshaft bearings.

1987 YJ with 6" shackle lift on 33x12.50R15's.
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post #36 of 37 Old 09-30-2013, 10:23 PM
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2005 LJ Wrangler 
Join Date: Apr 2012
Location: Corona
Posts: 5,033
Looking for the NAPA reman part number for the 136 amp alt. anyone have it handy? Found the Dodge Durango 160 amp alternator number but not the 136.

Posted via my pretentious iPhone.

EDIT: Nvrmnd found it OEM PN: 56027913

91 YJ "Alice" 4.0L, AX-15, NP 231 w/HnT Flange, Adams Driveshafts F/R, 2.5" OME 36Rs, 5/8" /f12 Booms, 32" Yoko ATs, 4.10 D30/35 Aussie Lockers F/R Busted Knuckles YJOTM never
05 LJ Rubicon "Ghost"

Luck Favours The Prepared
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post #37 of 37 Old 10-01-2013, 02:24 PM
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1995 YJ Wrangler 
Join Date: May 2011
Location: Baltimore
Posts: 3,762
I did the Alt upgrade. I upgraded the pos and neg wire as well. Then I installed a rediculously big battery to run the winch. Then a year later I spent two days on the phone with Que running down an electrical issue. The issue would have never came about if I would have fused the POS wire. Learn from my mistake put in a fuse with the upgraded wiring it will save alot of headaches. In the end it fried a head unit killed the alt and shorted the battery.

1995 YJ. 2 inch BDS Spring lift. 1 inch shackle lift. 1.25 inch JKS Body Lift 33x12.5x15's. Engo 10,000 pound winch.

Originally Posted by Magnum View Post
I gave the Jeep the required offering of $$, sweat, and blood, and everything works fine now. -- Jim
Originally Posted by ldso View Post
. It started with a $200 axle, and a few thousand dollars later I was done :)
Originally Posted by Luuca View Post
diagnose the real issue before you start going all Obama on it - spending mad cash you'll need for other important things.

Ask me how I know...
Originally Posted by Overhead View Post
this is also my second set of RC springs this year. I'd rather spend the money again and get something that will last.
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