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Old 06-27-2014, 08:23 PM
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Noise from axles

I have a jeep gc ltd with quadratrac all time awd. When I turn left sharp and only left it makes a humming kind of noise. Not so much a grind. Wondering if I may have a bearing issue. Not sure plz help.
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Old 06-27-2014, 08:48 PM
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Re: Noise from axles

I would check the drive shaft CV joint boots first. If ok, then check the T-case fluid and when it was changed a long time ago, it could be wise to put new fluid in first. It still can be a wheel bearing as well.
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Old 06-27-2014, 09:22 PM
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Yeah I need to check that fluid badly I never did
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Old 06-28-2014, 03:14 PM
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About how many quarts per front and rear differential's. I was told about 5-6 for the rear only and the auto parts store by me was $21/qt. Thats the purple power stuff too. Rather not spend $200 just on fluid if I dont need to at the moment. Any suggestions would be appreciated. Especially how much is usually needed.
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Old 06-28-2014, 06:04 PM
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This should help with amounts and weights-

http://www.wjjeeps.com/service/maintenance_wj.htm

You don't need to get the Royal Purple, but whatever you get, make sure you get the right weight if you tow, and pay attention to the friction modifier additive you may need if you have Track-lok or Posi-lok.
Either way, the gear fluid you need isn't gonna be that cheap. :-(

The bright side is that it's regular required maintenance that you only have to do every once in a while.
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Old 06-28-2014, 07:50 PM
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Re: Noise from axles

I just Changed the fluids in my diffs last week. I also have quadra trac ll, which means it has open diffs. My diffs have a plate showing 80W90 mineral, which i always use. When you tow its maybe wise to use 75W140 synthetic. I bought 4 liters in total and a bit was left over. You also need RTV to seal the covers off and a funnel or small pump to put the new fluid in.
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Old 06-28-2014, 09:10 PM
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Thank you very much for the info
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Old 06-30-2014, 11:09 AM
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So I was just at Tractor Supply and found they have the least expensive gear oil I've seen.

$3.99/qt for 80w-90
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Old 06-30-2014, 11:45 AM
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Shit just did them yesterday, turns out the guy at O'Reilys is a dipshit. It only took 4qts. to fill both diffs. with a little left over. Not 6 for just the rear. All done but didnt cure the noise that happens still.
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Old 06-30-2014, 11:59 AM
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I literally just got done doing mine too.

Your auto parts guy probably missed that it was "pts" and not "qts". Guess that's where the old P's and Q's adage came from!

Sucks it didn't solve your problem though but at least you eliminated one possible cause and it probably needed it anyway.
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Old 06-30-2014, 09:52 PM
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Re: Noise from axles

And did you check the T-case fluid? If this level is low, or the fluid old, then the T-case progressive coupler can start making strange noises when there is a speed differential between front and rear prop shaft. The NV247 needs special Mopar fluid, which is Mobil 424.
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Old 07-17-2014, 07:22 PM
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so I change the differential fluids and nothing has happened since its still acting the same.since I started driving 90 miles to work and home everyday the noise has gotten significantly worse.but this only happens when I turn to the left sharp and not give a lot of throttle through the turn. if i go faster around the turn it doesn't make the noise seems like when I throttle it doesn't make the noise but wen I'm not throttling it does.what would you suggest to check next. the noise only sounds like it's coming from the rear.
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