Limited slip diff - concern or not? - Jeep Commander Forums: Jeep Commander Forum
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post #1 of 17 (permalink) Old 09-24-2017, 12:06 PM Thread Starter
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Limited slip diff - concern or not?

My 06 XK Limited has the QDII with Electronic Limited Slip Diff (ELSD). Only had it about one month now and I am trying to understand if it is operating correctly or not. I have owned multiple Jeeps before with true lockers (ARB, etc) as well as a Grand Cherokee with the QDII and Vari-Lock diff's so I understand lockers and what they feel like in different situations. However, my XK ELSD is not acting like I would expect.
When I first got my XK, the clutch plates in the front diff would chatter a lot when making a sharp turn on dry surfaces when I first started driving it each day or after it had sat for awhile during the day. Once it had warmed up, there was significantly less chatter on a sharp turn and no feedback in normal street driving. I had no info on what the PO had done to service the diff's so I did not know how many miles were on the fluid nor if he had added any of the added lubricant that should be used in this type of diff. I suspected that the chatter was due lack of the lubricant additive or excessive mileage on the fluids so I change the fluids in both diff's and included the extra lubricant. That was about 200 miles ago. Since then, I have seen a slight reduction in the chatter but not as much as I would have expected. Currently, I still get some front diff chatter on sharp turns when diffs are cold but it quickly dies down as it warms up but never totally goes away.
Can I expect an improvement with more miles or is this this normal for the ELSD?

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post #2 of 17 (permalink) Old 09-24-2017, 01:43 PM
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Lightbulb Check

When I put my XK in 4 LO and punch it in gravel I will have all 4 tires leaving spin marks, this does not help your chatter problem but may show you that the Difs. are locking up. Drive it alittle more and change the fluids again as at least in the front it may not have flushed all the crud out.


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post #3 of 17 (permalink) Old 09-24-2017, 10:58 PM
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Quote:
Originally Posted by PaulD View Post
My 06 XK Limited has the QDII with Electronic Limited Slip Diff (ELSD). Only had it about one month now and I am trying to understand if it is operating correctly or not. I have owned multiple Jeeps before with true lockers (ARB, etc) as well as a Grand Cherokee with the QDII and Vari-Lock diff's so I understand lockers and what they feel like in different situations. However, my XK ELSD is not acting like I would expect.
When I first got my XK, the clutch plates in the front diff would chatter a lot when making a sharp turn on dry surfaces when I first started driving it each day or after it had sat for awhile during the day. Once it had warmed up, there was significantly less chatter on a sharp turn and no feedback in normal street driving. I had no info on what the PO had done to service the diff's so I did not know how many miles were on the fluid nor if he had added any of the added lubricant that should be used in this type of diff. I suspected that the chatter was due lack of the lubricant additive or excessive mileage on the fluids so I change the fluids in both diff's and included the extra lubricant. That was about 200 miles ago. Since then, I have seen a slight reduction in the chatter but not as much as I would have expected. Currently, I still get some front diff chatter on sharp turns when diffs are cold but it quickly dies down as it warms up but never totally goes away.
Can I expect an improvement with more miles or is this this normal for the ELSD?
It is definitely not normal.

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post #4 of 17 (permalink) Old 09-25-2017, 05:01 AM
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Quote:
Originally Posted by PaulD View Post
When I first got my XK, the clutch plates in the front diff would chatter a lot when making a sharp turn on dry surfaces when I first started driving it each day or after it had sat for awhile during the day. Once it had warmed up, there was significantly less chatter on a sharp turn and no feedback in normal street driving. I had no info on what the PO had done to service the diff's so I did not know how many miles were on the fluid nor if he had added any of the added lubricant that should be used in this type of diff. I suspected that the chatter was due lack of the lubricant additive or excessive mileage on the fluids so I change the fluids in both diff's and included the extra lubricant. That was about 200 miles ago. Since then, I have seen a slight reduction in the chatter but not as much as I would have expected. Currently, I still get some front diff chatter on sharp turns when diffs are cold but it quickly dies down as it warms up but never totally goes away.
Can I expect an improvement with more miles or is this this normal for the ELSD?
I don't have ELSD but this definitely does not sound normal to me.

I'd say take Swanny's advice;

Quote:
Originally Posted by 2010 inferno
Drive it alittle more and change the fluids again as at least in the front it may not have flushed all the crud out.


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post #5 of 17 (permalink) Old 09-25-2017, 06:48 AM
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Did you change the Transfer case oil? It also has a special oil, only available from a Jeep dealer - about $20. On the 06's there was a recall for the transfer case oil - was causing "Lock Shudder" where when wheels turned all the way either way (lock) it would shudder. They changed to a better oil. The oil is NV 245/247 and you need 3.8 pints (2 quarts)
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Last edited by rblapham; 09-25-2017 at 07:14 AM.
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post #6 of 17 (permalink) Old 09-25-2017, 09:46 AM Thread Starter
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Quote:
Originally Posted by rblapham View Post
Did you change the Transfer case oil? It also has a special oil, only available from a Jeep dealer - about $20. On the 06's there was a recall for the transfer case oil - was causing "Lock Shudder" where when wheels turned all the way either way (lock) it would shudder. They changed to a better oil. The oil is NV 245/247 and you need 3.8 pints (2 quarts)
What recall are you referring to? All recalls specific to my VIN have been done and I do not find any recall on the 06 for this issue.
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post #7 of 17 (permalink) Old 09-25-2017, 07:01 PM
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I probably meant a service bulletin on the problem where they changed the fluid type, sorry.

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post #8 of 17 (permalink) Old 09-26-2017, 08:52 AM Thread Starter
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Quote:
Originally Posted by rblapham View Post
I probably meant a service bulletin on the problem where they changed the fluid type, sorry.
TSB or not, thanks for pointing that out. As a result of your comments, I started searching and found that the NV245/247 fluid is indeed the correct fluid for the NP 245 transfer case on my 06 XK Limited. Early 06 printed owner manuals called out ATF+4 but that was changed to the NV 245/247 in later editions of the printed manual. The on-line version also calls out NV245/247. This fluid only applies to those with the QDII transfer case....not to the QT series. This change has caused a lot of confusion among XK owners as I discovered in a earlier thread I found on this subject.
From what I saw, the clutches in the QDII had problems with the ATF+4 which would not let the clutches release as intended under some circumstances. This caused them to shutter when under stress. I never found any info explaining what was different about the chemistry of the NV245/247 fluid (more slippery?) other than it is not red like ATF+4. The new fluid is yellow so it will be easy to tell if you have the right fluid when you drain the xfer case.
I do not know what fluid mine has now but I ordered some of the Mopar fluid and plan to change mine.
PS - you can get this fluid on line at Amazon for about $13/qt.
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Last edited by PaulD; 09-26-2017 at 08:53 AM. Reason: more info
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post #9 of 17 (permalink) Old 09-26-2017, 10:32 PM
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Quote:
Originally Posted by PaulD View Post
TSB or not, thanks for pointing that out. As a result of your comments, I started searching and found that the NV245/247 fluid is indeed the correct fluid for the NP 245 transfer case on my 06 XK Limited. Early 06 printed owner manuals called out ATF+4 but that was changed to the NV 245/247 in later editions of the printed manual. The on-line version also calls out NV245/247. This fluid only applies to those with the QDII transfer case....not to the QT series. This change has caused a lot of confusion among XK owners as I discovered in a earlier thread I found on this subject.
NP245 Transfer case?

I haven't heard of this before.

In all the documentation I've ever seen and read, all Quadra-Trac II and Quadra-Drive II Commanders use the same NV245 transfer case.


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Last edited by Big Blue; 09-27-2017 at 10:51 PM.
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post #10 of 17 (permalink) Old 09-27-2017, 08:33 AM Thread Starter
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Quote:
Originally Posted by Big Blue View Post
NP245 Transfer case?

I haven't heard of this before.

In all the documentation I've ever seen and read, all Quadra-Trac II and Quadra-Drive II Commanders use the same NV245 transfer case.
You are correct. I was thinking of the NP transfer cases when I typed that. My bad.

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