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  #1  
Old 09-15-2010, 11:18 PM
slikkwilly002 slikkwilly002 is offline
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Default Binding/vibration from rear end when turning

I know I've already posted something about this somewhere before... but I have a problem with my rear end, sounds like chattering, i feel vibration, and a little binding up when i turn after driving for long periods of time.. saw a few other posts about this as well. I went to a trans shop to pick up one of our work vans today and I asked him the same question, he asked what type of LSD I had.. he said if i had a limited slip with clutches, i should change the fluid and inspect the clutches.. he said if I had a locker (there was a name before it, but i dont remember, not a detroit locker) that it was probably shot because Dodge put some locker type rear ends in some of its trucks and they pretty much all went to crap. Not sure if he really knew what he was talking about or if they really did that.. and is there any way to find out aside from taking it all apart? I have a 2000 3/4 ton, dana 60 HD in the rear. I would assume it would be a regular LSD with clutches
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Old 09-17-2010, 08:09 AM
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Old 09-17-2010, 08:21 AM
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You can ask a local dealer to run your VIN through the system for your build info. That would tell you how it was built.

This sounds familiar and with LSD's, you do need to change the diff fluid and add the friction clutch lube more often than an open diff.

Any idea when you last had this done?
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Old 09-17-2010, 10:30 PM
slikkwilly002 slikkwilly002 is offline
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Quote:
Originally Posted by MADDOG View Post
You can ask a local dealer to run your VIN through the system for your build info. That would tell you how it was built.

This sounds familiar and with LSD's, you do need to change the diff fluid and add the friction clutch lube more often than an open diff.

Any idea when you last had this done?
Well, I had this problem about a year ago and they "supposedly" changed the fluid when they checked out my rear diff to see if they could find anything messed up, and they said they added some friction modifier. I doubt they did it, I just dealt with the problem for a year.. now it seems to be getting pretty bad and I just don't want something major to happen one day when I'm up north in the middle of nowhere by myself, so I'm a little more concerned about it now. I may have to check with the dealer and see what's up. Do you think they'd have no problem pulling that info for me with an old truck?
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Old 09-17-2010, 10:31 PM
slikkwilly002 slikkwilly002 is offline
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And thanks for the bump DSP
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Old 09-17-2010, 10:34 PM
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Keep up on the servicing of the rear . I think the manual recommends every 15,000 miles . You don't want to ruin your rear like I did .
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Old 09-24-2010, 10:56 PM
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So... today I added a tube of friction modifier, did a bunch of figure 8's and the vibration started after about 5 mins of driving in circles. Didn't hear the noise though, but then again everything was always fine just driving short distances after it sat for a bit. Only happened after driving for a while. but this could be a start... Heading up north to the woods for the weekend, I'll have to see if it's any better when I get off the freeway, usually its vibrating bad and chattering like crazy as soon as i get off the freeway
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Old 09-24-2010, 11:05 PM
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Are both the rear tires the exact same size with relatively the same wear? Even a small difference in the tire size with an LSD, can cause havoc.

Did you use Mopar friction modifier? There are some out there that do not work properly. If you used a non Mopar modifier, I would recommend changing the dif fluid and use strictly OEM fluids. If nothing changes, at least you have fresh fluid, but there is always the chance that you come out of this with a smile.
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Old 09-25-2010, 08:01 AM
slikkwilly002 slikkwilly002 is offline
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Yep, both tires the exact same, and I didn't use the Mopar modifier.. if this doesn't work after this weekend, thats just what I'm gonna do, change the oil and check out the clutches while i got it open. Any ideas on what gear oil i should use?
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Old 09-25-2010, 09:47 AM
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I believe yours uses 70W-140 Synthetic and friction modifier. This should be verified with the service / parts department prior to purchasing. It is possible there are specific requirements for your model year / build that they can check. If you have the owners manual for your truck, that is also an excellent resource for this information.

Hope this all turns out well for you.
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