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Old 04-13-2014, 08:00 PM   #1
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Grinding Noise While Turning

Hi.
I've just got into a brand old '99 4.0L Wrangler, and also my first Jeep. I'm excited.

I noticed something yesterday however. When I have the wheel cut 100% in either direction there's a metal on metal grinding noise that's coming from, what I think, is the drive shaft. It does this going forward and in reverse, and in both 2WD or 4WD. I had originally thought it was the wheels rubbing because it has 31x10.5 tires on there but I noticed yesterday it wasn't. I took a video to make it more clear. Here's the video.

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Old 04-13-2014, 10:31 PM   #2
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Originally Posted by CoolCheech View Post
Hi. I've just got into a brand old '99 4.0L Wrangler, and also my first Jeep. I'm excited. I noticed something yesterday however. When I have the wheel cut 100% in either direction there's a metal on metal grinding noise that's coming from, what I think, is the drive shaft. It does this going forward and in reverse, and in both 2WD or 4WD. I had originally thought it was the wheels rubbing because it has 31x10.5 tires on there but I noticed yesterday it wasn't. I took a video to make it more clear. Here's the video.
You're not talking about the clicking noise are you?

If you're just talking about the grinding, it's your power steering pump at full lock. All cars that use a PS pump make this noise at full lock.

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Old 04-14-2014, 08:29 AM   #3
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Originally Posted by jherrington View Post
You're not talking about the clicking noise are you?

If you're just talking about the grinding, it's your power steering pump at full lock. All cars that use a PS pump make this noise at full lock.
The noise starts at 3seconds in when the car starts moving. I just hear the car engine noise and grinding (which kind of sounds like clicking in the video).
Will adding power steering fluid rectify anything?
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Old 04-14-2014, 01:21 PM   #4
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Originally Posted by CoolCheech View Post
The noise starts at 3seconds in when the car starts moving. I just hear the car engine noise and grinding (which kind of sounds like clicking in the video). Will adding power steering fluid rectify anything?
PS fluid shouldn't change anything as the steering is not changing as you inch forward. Therefore all sounds from that should remain the same. It almost sounds like a bad axle ujoint since they are already binding pretty bad at full lock. But if it's a true grind, you got me.
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Old 04-14-2014, 04:05 PM   #5
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You can try adjusting the steer stop. Worth a try even though I know it's not your tires rubbing.

Jeep Steer Stop Adjustment
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Old 04-14-2014, 04:12 PM   #6
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Check to see if something is pushing the rotor dust shields into the rotors at full lock. Sometimes a tie rod / drag link end leans over enough to hit the shield when you really crank the wheel.

If not that, jack up the front axle and try to wiggle the wheels up/down, in/out, side/side. When the hubs go, they usually grind at high speed going straight as well, but you might be hearing one in the early stages of complaining.

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