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Old 02-08-2015, 12:15 AM
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Driveline shudder when cold

I recently picked up an '06 Overland (HEMI, QDII) which has 85k miles on it after my last '06 Overland was totaled a couple of months ago.

When the driveline is still cold/before the fluids warm up I'm getting a pretty decent shudder while backing out of my driveway and tight turns. The sharper the turn, the more significant the shudder is. After driving a few miles the shudder is completely gone.

I've changed the fluid in both diff's and the transfer case with the appropriate fluids and additives. Fresh fluid has not made any improvement.

I've been told that it's probably the transfer case, but I feel it more in the front-end and it feels like it may be the front diff. It was recommended that I put a bottle of the diff. additive in the transfer case, has anyone ever done this?

Anyone ever have this shudder problem or have any recommendations?

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Old 02-08-2015, 12:40 PM
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Re: Driveline shudder when cold

I don´t think its wise to use the limited slip additive in the T-case, the special Mopar fluid (which is Mobil 424) should be enough to prevent any shudder caused by the T-case.
Did you make tight figure 8´s after changing the fluids? In that way the fresh fluid (and additive) will be mixed well inside the diff locks. If it still seems to be binding in tight turns, then maybe some more limited slip additive is needed.
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Old 02-09-2015, 12:24 PM
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Re: Driveline shudder when cold

Quote:
Originally Posted by Frango100 View Post
I don´t think its wise to use the limited slip additive in the T-case, the special Mopar fluid (which is Mobil 424) should be enough to prevent any shudder caused by the T-case.
Did you make tight figure 8´s after changing the fluids? In that way the fresh fluid (and additive) will be mixed well inside the diff locks. If it still seems to be binding in tight turns, then maybe some more limited slip additive is needed.
I changed the fluid in both diff's and the transfer case with the correct fluids and additive right after buying the truck in December. Doing so did not help the shudder at all. I even added another 1/2 bottle of diff. additive to the front diff. to no avail.

As for figure 8's, I did that when I first changed the fluid and have been driving the truck for over 2 months, it's definitely mixed in there well.
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Old 02-19-2015, 02:54 PM
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Re: Driveline shudder when cold

Check your front diff bushings. It is very common for the one on the pumpkin to wear out and allows the diff to move quite a bit. Mine was making a thumping only when the Jeep would sit overnight in the cold. Once it warmed up, the noise stopped. I replaced the bushing and the thump from D-N-R is gone. I haven't tried it in the cold yet since I am not in the States right now.
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