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Old 12-15-2010, 09:52 PM
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Front end grinding

Hey guys
heres my stroy- I own a 2000 jeep grand cherokee limited.
Grinding noise in the front end sounds just like brakes worn out.
Thought my front brakes were shot. Took them to a friend and he confirmed it was NOT my brakes. He said it was my front passenger wheelbearing. Purchase the wheel bearing have him put it on. He tells me my driver side wheel bearing is shot AND there are TWO different noises coming from the front end. Not good!!!
He checked my Differential fluid and it was very low with a small amount of metal inside. He changes the fluid with synthetic 74-145- (I think).
He tells my front differential is shot and I need a new one or a better route would be to get a complete front axle from salvage yard!
Its been two weeks and three days and I have not done anything. There is still grinding but it is a little less since he changed the bearing.

Does anyone have any experience with this problem?
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Old 12-15-2010, 11:18 PM
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Smile Re: Front end grinding

Also Ive looked into some complete front axles at local salvage yard and found one that fits my jeep for 550.00 dollars. It was from a 2002 with 73,000 miles. Ive been told that is a good deal....


Does anyone on here think that this problem could be something other thatn a bad differential? ANYONE with similar problems past or present please share!! thanks
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Old 12-16-2010, 07:52 AM
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Re: Front end grinding

Anymore specifics on the grinding? Does the grinding start immediately when you start rolling? Or does it start after you get to a certain speed? Is it something where you could jack up the front end and rotate the tires to hear it?

$550 for a front axle assembly seems like an average deal. I find them at the junk yards here anywhere from $400-$450.

If you know how to rebuild a differential, it would be cheaper to rebuild it. If you're going to pay someone to do it, it's going to most likely run around $600 (depending on what's wrong). In which case, I would buy a new front axle assembly and swap it myself.
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Old 12-16-2010, 09:36 AM
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Re: Front end grinding

My quadradrive would grind make a god awful noise . I changed both axles wheel bearings and driveshaft still made the noise . I noticed it did it in cold weather more. I figured out it was my transfercase .Recently i did a 242hd swap so i can have 2wd and 4wd and no more noise . But i went through the same thing thinking of swapping out the front axle and that was the way i was going to go . I found some on car-part.com that were decently priced . But i feel your pain of tracking down front end noises.
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Old 12-16-2010, 08:48 PM
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Re: Front end grinding

Quote:
Originally Posted by JeepMe View Post
Anymore specifics on the grinding? Does the grinding start immediately when you start rolling? Or does it start after you get to a certain speed? Is it something where you could jack up the front end and rotate the tires to hear it?
It starts as soon as I start rolling. I could jack it up and spin the wheel but I already know that the wheel bearing is bad. I just dont want to buy another wheel bearing if Im going to pick up the complete front axle.
$550 for a front axle assembly seems like an average deal. I find them at the junk yards here anywhere from $400-$450.

I didnt look that hard but If I do go to that same place I will offer them 500. I live in Wisconsin.

If you know how to rebuild a differential, it would be cheaper to rebuild it. If you're going to pay someone to do it, it's going to most likely run around $600 (depending on what's wrong). In which case, I would buy a new front axle assembly and swap it myself.
How much would rebuilding a differential cost IF I knew someone that would do it?
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Old 12-16-2010, 08:52 PM
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Re: Front end grinding

Quote:
Originally Posted by svt393 View Post
My quadradrive would grind make a god awful noise . I changed both axles wheel bearings and driveshaft still made the noise . I noticed it did it in cold weather more. I figured out it was my transfercase .Recently i did a 242hd swap so i can have 2wd and 4wd and no more noise . But i went through the same thing thinking of swapping out the front axle and that was the way i was going to go . I found some on car-part.com that were decently priced . But i feel your pain of tracking down front end noises.
See thats the thing there are just so many things that I think need to be ruled out yet in order for me to go ahead and drop around 800-900 for the front axle bought and installed.
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Old 12-17-2010, 08:52 AM
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Re: Front end grinding

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Originally Posted by pushharder View Post
How much would rebuilding a differential cost IF I knew someone that would do it?
If you knew someone that would do it for free it wouldn't be that much. You would most likely need a few bearings and sleaves. When I rebuilt my Mustang rear diff, it was about $125. Bearing will need to be pressed out and it'll take a good day or two.

If you're going to have to pay someone you know, it depends on how much they charge you.

Honestly, these wheel bearings are not like anything I've ever dealt with (they don't seem normal to me). The front end of my Jeep had been squeeking for MONTHS (probably 5-6 months). It would start when the Jeep was going faster than 10-15mph. It was a squeeking noise that was proportional to speed. I originally thought it was a wheel bearing but decided it wasn't b/c it had been going on for months (usually they will only last a few weeks when they go bad) and it was a squeeking noise (and bad wheel bearings usually sound like a big offroad tire going down the road or grinding). Took it to a shop for diagnostic and it turns out it was the wheel bearing. I took it home and replaced it. It's not difficult to replace them unless it turns out like mine. I used a 3 jaw puller attached to the hub and the bearing was seized in so well that it just pulled the bearing in half.

You never know, it might be your bearing. They are only $65 and if you end up getting a new axle, remove it and you'll have a spare (I replaced both mine and kept the good one as a spare).
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Old 01-05-2011, 07:48 PM
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Re: Front end grinding

Just a little bump.Hoping some more people have insight>>>>
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Old 01-06-2011, 12:22 PM
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Re: Front end grinding

So your problem is still there?
I would check the diff oil again to see if its clean. If there is some glinstering stuff in there, you can be sure that something in the diff is shot, probably a bearing. And due to the fact that there was some metal in there before, this is probably your problem. Also the noise level went down after changing the diff oil, so one more evidence that the problem is there.
If you want to troubleshoot more before changing the front diff, here some more ideas:
The noise can also be from the propeller shaft CV joints or universal joints or the front axle CV joints or even the T-case. Did you check the T-case fluid level and check for glinstering in the fluid? If Diff and T-case seem to be ok, i would first try by hand to feel is ther is some play (radially and axially) on the propeller shaft joints.
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Old 01-07-2011, 07:18 AM
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Re: Front end grinding

Hi to all,

I'm pretty new here but I'm looking into the same problem. A grinding noise coming from the front differential, getting worse while offroad whenever the transfer case sends more power to the front. I opened it up and one of the smaller sprockets of the differential gear is already missing half a tooth, lots of stuff in the oil. I would like to have both diff's completely rebuild. Is there a complete kit available, including all bearings, sprockets, ring and pinion?

@Frango100: Looks like we're in the same boat, did you ever find a reliable source for spare parts in Brazil without breaking the bank?
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Old 01-07-2011, 08:56 AM
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Re: Front end grinding

Hi Mimic73, welcome to the garage. Parts here in Brazil are indeed very expensive. I never buy anything at the dealer. There are some import guys i normally use, like NDO in Campinas and FM autoparts in São Paulo. I just ordered a waterpump and thermostat directly with rockauto in the US (last week) and the part is already in customs overhere, and also quite some cheaper then via the local import guys.
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Old 01-07-2011, 06:57 PM
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Re: Front end grinding

Hi Frango100,

Rockauto is my standard source as well, but everything exceeding 50$ is taking forever to clear customs... I just paid 170R$ in taxes on a Denso fuel pump, but it still beats the price from Caltabiano.
We live in Atlanta and SP, so I'm traveling back and forth 7 times a year, bringing back bits and pieces. But I don't really want to walk through customs with two complete differentials...
I'll have a look at the guys you indicated.
There's always something to tinker with on a Jeep, but I'm hooked somehow. Already looking at buying the next one.

I'll see if I find a good import solution and keep posting
Teja
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