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Old 12-19-2012, 12:05 PM   #1
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04 TJ X loud winding nosie.

OK i have a fiew questions. first off i have a 04 jeep wranlger X with 101000 Mi on it, 5 speed, lifted 4in with 35in MT. for the past 2 weeks i have been heraring this loud winding noise. it onley hppens when i press on the gas when the jeep is in gear. the noise kinda sound like if you where going fast with big knoby tires. the sound is not there when i start the jeep or when i press on the gas when it IS NOT IN GEAR. the sound is louder in 3,4,and 5th gear, not so much so in 1 or 2 gear. CAN YOU HELP ME.

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Old 12-19-2012, 12:09 PM   #2
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when you say "or when i press on the gas when it IS NOT IN GEAR. " I assume you are rolling down the highway and pop it into neutral?

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Old 12-19-2012, 12:11 PM   #3
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When my truck did that, it was a rear pinion bearing that was shot. Pumpkin was full of water and I didn't know it and it took out the bearing.
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Old 12-19-2012, 12:15 PM   #4
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yes that is correct. i was just trying to figure out what it was.
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Old 12-19-2012, 12:17 PM   #5
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When my truck did that, it was a rear pinion bearing that was shot. Pumpkin was full of water and I didn't know it and it took out the bearing.
how big of a pain is that to change?
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Old 12-19-2012, 12:32 PM   #6
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When my truck did that, it was a rear pinion bearing that was shot. Pumpkin was full of water and I didn't know it and it took out the bearing.
I just checked my rear diff fluied and it is 100% ok.
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Old 12-19-2012, 01:35 PM   #7
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Check your driveline U-joints too. They can squeal, whine, and/or vibrate when they start going bad.
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Old 12-19-2012, 01:57 PM   #8
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I think I found the problem. It turns out that 60% water in your transfer case is not an adequate supplement for ATF fluid.
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Old 12-20-2012, 09:03 PM   #9
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I think I found the problem. It turns out that 60% water in your transfer case is not an adequate supplement for ATF fluid.
Turns out that is not the problem. Im still having the noise. Could it be a bad clutch? im have a severe power lose.
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Old 12-20-2012, 11:48 PM   #10
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Check the transmission fuild?
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Old 12-21-2012, 10:51 AM   #11
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I had the same problem with my 05. Once I hit 60 on the hwy this loud howling/whining sound would blast from the back end, but only when accelerating. If the sounds is just when coasting it's the front pinon bearings, only when accelerating it's the rear.

I just finished (2 days ago) swapping the pinion and carrier bearings. Autozone carries a nice kit from Timken for $95 that includes all 4 bearings with races, new seal, new pinion nut, gear grease to check wear pattern, and blue RTV. It's a PIA job but doable. Make sure you have tall jack stands bc you'll have to get it up high enough by the frame so the axle can drop to pull the carrier.

The bearings themselves need to be pressed on and off, I took it to a local shop and they did it for $20 in about 15 minutes.

All told, keep in mind this was my first time messing with the gears at all, it took me about 10-12 hours over a couple days.

You'll also need to get a race driver, Autozone loans them out, to seat the new races. There's several videos on youtube that I watched to get an idea of the job beforehand.

EDIT: Also be sure to get axle grease to grease up the bearings before you put everything back in the pumpkin.
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Old 12-22-2012, 03:14 AM   #12
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Thank you so much ill take a look at that. I have never screwed with gears either. So this will be fun!

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