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Old 11-06-2012, 07:06 PM
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Low pitch whining

Good evening folks. My wife has a 07 SLT that develops a low pitch whine at 35-40 mph.
Took it to Big O and they told her it was the front wheel hub assemblies , the right more so than the left. I replaced the unit and the whine is still present.

To me it sounds a lot like straight cut gears meshing. Now I originally thought it was low on tranny fluid , but , as you know there's no dipstick to check. I need to take it to a dealer (something I don't want to do).
Can anyone shed any light on this issue if you've experienced something similar.


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Old 11-06-2012, 07:24 PM
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All of the components of the 4wd system spin all of the time. This includes the front 1/2 shafts as well as the front drive shaft, and thus, the front differential. I was pretty well pissed off when I found this out, as I wanted to know how the front hubs locked/unlocked. Since they are constantly spinning, the hubs do not have to lock/unlock. All the transfer case does is engage the front drive shaft, and lock it to the rear drive shaft: 50/50.

You do have to take it to a dealer to check the transmission fluid - how much $ would it have cost to give every Nitro a dipstick?

Since you have replaced your front hubs, have them look at the front 1/2 shafts, front differential, and front drive shaft - could be a bad bearing somewhere, or low fluid in the front differential.

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Old 11-06-2012, 07:39 PM
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Thanks for the input man. Ill take it to the dealer.


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Old 11-06-2012, 07:41 PM
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You are welcome. Pretty cheap and inefficiant 4wd system, if you ask me. None of my Jeeps were this way!

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Old 11-06-2012, 07:56 PM
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I prefer my butt closer to the ground , but , wifey wanted so............I gotta maintain it.


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Old 11-06-2012, 08:04 PM
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Originally Posted by dhh3 View Post
You are welcome. Pretty cheap and inefficiant 4wd system, if you ask me. None of my Jeeps were this way!

By your avatar am I right to assume you are/were a boom operator?

I served 6 in the USAF. Thank you for your service.


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Old 11-07-2012, 08:13 AM
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By your avatar am I right to assume you are/were a boom operator?

I served 6 in the USAF. Thank you for your service.


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Yes, boom operator on KC135. I was activted for Desert Storm, got hurt, ended up with a medical discharge. AF says I could no longer fly with a spinal cord injury.

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MODS: Sunroof; S/S Nerf Bars; Mopar CAI, Pedal Kit, Chrome Rear License Plate Brow, Chrome Exterior Package, Production Style Cross Bars, Deluxe Molded Splash Guards, Cargo Security Cover, Door Sills & 3.7L Emblem; Media Center 430; Kicker Speakers, Sub and Amps; Carbon Fiber Dash Kits; Heated Katzkin Leather.
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Old 11-08-2012, 10:39 AM
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Any lube shop - Mr Lube, Jiffy Lube etc has a dipstick for the Nitro tranny
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Old 11-08-2012, 10:49 AM
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Originally Posted by jhnhopkins View Post
Any lube shop - Mr Lube, Jiffy Lube etc has a dipstick for the Nitro tranny
I did not know this. Do you just ask and they can install it? When I purchased my Nitro, I received 4 free oil changes. Still have one more left, before I start using Jiffy Lube again.

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MODS: Sunroof; S/S Nerf Bars; Mopar CAI, Pedal Kit, Chrome Rear License Plate Brow, Chrome Exterior Package, Production Style Cross Bars, Deluxe Molded Splash Guards, Cargo Security Cover, Door Sills & 3.7L Emblem; Media Center 430; Kicker Speakers, Sub and Amps; Carbon Fiber Dash Kits; Heated Katzkin Leather.
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Old 11-09-2012, 10:19 AM
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Not for sale, but to check your oil level for you, my point was that you don't have to go to the dealership.
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