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Unread 10-08-2010, 02:56 PM   #1
Tiras
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2002 KJ Liberty 
 
Join Date: Oct 2010
Location: SF
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Rear differential problem

I have 107K miles on my 2002 4x4 Limilted. The rear differential has been repaired twice already. Luckily by powertrain warranty. Now it's out of warranty and I am afrain it will happen again. It starts with a roaring noise from behind and get louder and louder.

What would it cost to replace or fix it including parts and labor? or

Maybe its a good time to get rid of it until it broke again.

Please advice.

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Unread 11-05-2010, 08:53 AM   #2
TigerJeep111
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Have you fixed it?

I'm curious if you've gotten this fixed again or not.

I have a 05 Sport and have 149K. Replaced entire rear diff at about 60K under warranty. Need it replaced again (grinding sound at about 45 mph), and I get a $1,400 quote for using a used rear diff. That only comes with a 100 day warranty. Not sure if I should just get new and hopefully that part will have a better warranty.

Would like to know what you learned....

TigerJeep
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Unread 11-05-2010, 01:11 PM   #3
WXman
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There are complete rear axle assemblies in salvage yards everywhere for $700 or so. I personally would try just swapping in the entire thing. Yours might be going bad repetitively because the tube is bent or something is cast wrong. It might be good to just try a completely different axle assy. altogether.
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Unread 11-05-2010, 05:01 PM   #4
Bmach
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I would think that something like that happening twice could only have 3 causes
1 lack of fluid change
2 lots of abuse
3 something not right in the setup of the gears

If fluids are changed according to the service schedule and not abused then I would be all over Jeep to fix it at their cost. There is no way they should go bad after 3 times at a little over 100,000.
IMO
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Unread 11-05-2010, 07:42 PM   #5
tjkj2002
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Quote:
Originally Posted by Bmach View Post
I would think that something like that happening twice could only have 3 causes
1 lack of fluid change
2 lots of abuse
3 something not right in the setup of the gears

If fluids are changed according to the service schedule and not abused then I would be all over Jeep to fix it at their cost. There is no way they should go bad after 3 times at a little over 100,000.
IMO
#1 is the big one as you are supposed to change out the gear oil every 12k-15 if using synthetic gear oil,any longer and your damaging your diffs.
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Unread 11-06-2010, 01:18 PM   #6
Tiras
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What do you mean by "abused"?

@Bmatch

I agree with lack of fluids or something bent.

I am not sure what "abused" means? You just driving it right? Can you abuse it by a lot of driving? That's just driving, not "abusing"?

Please advice.
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Unread 11-07-2010, 01:27 AM   #7
LibertyTC
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Tiras,
When you say repaired what exactly was repaired? Gears clutch plates etc? Is this a Trac-Lok differential?
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Unread 11-07-2010, 01:12 PM   #8
Bmach
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What I mean by abuse is a lot of hard off road on and off the gas hard.
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Unread 11-08-2010, 12:14 AM   #9
Tiras
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Hi Bmatch,

I see what you mean. No, I rarely go offroad. Mostly normal city pavement. No abuse then.

Thank you.
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Unread 11-08-2010, 12:26 AM   #10
Tiras
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Hi LibertyTC,

They replace bearrings, pinions, seals. Three times already since 2007. Then 2008, and 2009 last time. Actually i am not sure what kind differential it is. How can I tell? What kind of rear differential comes with 2002 Liberty Limited 4x4?

I am not using the vehicle as often as before. But I think I start hearing that grinding noise again. Warranty expired already. So I wonder if I should get rid of this piece of **** now..

Please advice.
Thank you!!
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Unread 11-11-2010, 08:42 AM   #11
Bmach
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I would bring in my records and have a talk with the service writer and go over their head if you do not get any satisfaction. You should not be having the same items replaced once a year, there is something causing the problem and they need to find it and eat those costs seeing they did not find the problem the three other times you had it in.
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Unread 11-11-2010, 08:48 AM   #12
tjkj2002
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Quote:
Originally Posted by Tiras View Post
Hi LibertyTC,

They replace bearrings, pinions, seals. Three times already since 2007. Then 2008, and 2009 last time. Actually i am not sure what kind differential it is. How can I tell? What kind of rear differential comes with 2002 Liberty Limited 4x4?

I am not using the vehicle as often as before. But I think I start hearing that grinding noise again. Warranty expired already. So I wonder if I should get rid of this piece of **** now..

Please advice.
Thank you!!
Just wondering if you have the 8.25 or D35 rear diff?
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Unread 11-25-2010, 05:31 PM   #13
Tiras
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I just scheduled an appointment with a Jeep service next Wednesday. See what they say about the problem. Oh maybe.. I start hearing things again after three repairs. Chrysler wants to get to the bottom of the problem and fix things.

Thanks.
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