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jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29094
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Re: X-Trail Diff Failure!


Hi Guys,

I must be the first case ever to have an exy with a rear diff failure cause I can't find anyone with a similar problem in the xtrail, but I found many sources of information discussing the causes of it.

I have mentioned my problem in THIS Grinding thread, but this grinding turned out to be a total rear diff failure.

Now, when I look at the symptoms associated with rear diff failures they're an exact match to what happened to me since I started feeling the exy getting a bit noisy.

The symptoms are:

A slight whirring on coast, and a noticeable delay, or slop, in the drive train between coast and acceleration, a sensation like the rear had to catch up to the front, while things felt totally normal from a stop. Failure was quite sudden, first a loud clunk from the rear and then continuous grinding.

I even complained to my local mechanic last weekend that I can hear grinding noise when hard braking or braking at high speed. I thought I had dead wheel bearings or the slotted rotors were causing problems, but the mechanic blamed this noise on the tyres. Turns out it was the rear diff making all these noises in the first place and that grinding noise was probably the diff bearings giving up emoticon

The major cause of a diff failure is low diff oil level OR the incorrect diff oil !!!

This is where it gets interesting!

I had the rear diff oil checked and replaced at the 80,000kms service (that is about 8,000kms ago) by the Nissan dealer and I have the receipt to prove it. If the diff oil was really changed at that service then a sudden failure like this couldn't have happened so soon. This leaves me to believe that either the diff oil was NOT changed or they used the WRONG type of diff oil.

I am still waiting for the complete assessment of damage from the dealer to see what exactly the problem is, but I have already called the wreckers inquiring about a rear diff and to my surprise it only cost $350.00 for one in very good condition.

I guess demand is very low for rear diffs on the xtrail and which may prove that failures like this are not common at all.

I'll see how will this play out with the dealer but my first reaction to them when they said they suspected a rear diff failure was "You guys changed the diff oil at the last service!"


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2/Nov/2007, 3:23 pm Link to this post Send Private Message MSN Blog
 
basshead Profile
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X-TRAIL HOLIC
 


Date Registered: 02-2004
Location: Panania, Sydney
TOTAL POSTS: 2852
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Re: X-Trail Diff Failure!


quote:

jalalski wrote:

The major cause of a diff failure is low diff oil level OR the incorrect diff oil !!!

This is where it gets interesting!

I had the rear diff oil checked and replaced at the 80,000kms service (that is about 8,000kms ago) by the Nissan dealer and I have the receipt to prove it. If the diff oil was really changed at that service then a sudden failure like this couldn't have happened so soon. This leaves me to believe that either the diff oil was NOT changed or they used the WRONG type of diff oil.

<snip>

I'll see how will this play out with the dealer but my first reaction to them when they said they suspected a rear diff failure was "You guys changed the diff oil at the last service!"



And then what was *their* response to that statement?

I've always been wary of paying for services as I've heard more stories from friends and family than I can possibly remember, where the servicing company (not always dealerships, but mostly so) hasn't done what's stated on their report, and it tends to be the items least likely to be checked by the owner (would that be because they're also the more difficult tasks to do?). In your case though, a diff top-up wouldn't be too difficult, especially if it's already up on a hoist.

I always do a simple task such as put an inconspicuous mark/dent on the oil filter to make sure they do change it, and don't just wipe it over with a rag to make it look like it's been changed.


I'm interested to see how this pans out for you, Jalal. Common courtesy would be for the dealership to come good on a replacement diff. After all, they stamped the book, and I'm sure their service report even states "inspect level/renew diff oil" or similar, and the scheduled servicing is also known as "preventative maintenance" meaning just that - to prevent things going wrong. I don't think they'd be able to prove that the diff failure could be put down to normal wear and tear, that's for sure!


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Rich. X-013(c)
'04 S2 ST Auto. Nudge_roofracks_tow_tints_Lightforce_GME_YokoGeoA/T-S_TBS_bashplate_50mm-spacer-lift
Click here to see >300MB of photos and videos All For His Glory.
2/Nov/2007, 5:45 pm Link to this post Send Email PM   Send Private Message MSN Yahoo Blog
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29094
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Re: X-Trail Diff Breathers & Diff Oil


Hi Rich,

No response, just a very surprised look because this is the first time that they ever had to deal with failed xtrail rear diff.

I was surprised myself this morning when it happened and kept thinking how is this possible!

I wasn't thinking clearly when I was there cause this came as a shock to me and it happened so fast, so all I wanted to do is leave my car there and get the loan car, so I could come back and think it over.

On Monday I will be going there and having a serious talk about it.

I was even suspecting that the diff couldn't cope with all that extra torque I had, which obviously is not the case, although it was the first thing my brother in law said to me when I told him what happened (jokingly of course) emoticon

Last edited by jalalski, 2/Nov/2007, 6:57 pm


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2/Nov/2007, 6:04 pm Link to this post Send Private Message MSN Blog
 
Dave4x4 Profile
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Date Registered: 08-2005
Location: NEWCASTLE
TOTAL POSTS: 690
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Re: X-Trail Diff Breathers & Diff Oil


Jalal,
I'm sorry to hear this abot your Exy as this should not have happened at this early stage. Considering the rear diff is only getting a free ride most of the time compared to the front OK maybe your rear diff gets a little bit more use than others emoticon This is why I change all oils in any vehicle I own at 20,000k's. I would think in this instance considering who you are and how this has come about that your dealer would be obligated to carry out the repaires free of charge

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(Dave Newcastle 2004 ST
ID: X211

2/Nov/2007, 6:48 pm Link to this post Send Email PM   Send Private Message
 
bluexy Profile
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Date Registered: 05-2007
TOTAL POSTS: 125
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Re: X-Trail Diff Breathers & Diff Oil


hi all has anyone used fully synthetic oil for their back diff on the exy?if so what brand and is there any difference.
9/Nov/2007, 4:53 pm Link to this post Send Email PM   Send Private Message
 
BRETT72 Profile
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Date Registered: 10-2005
Location: Orange. NSW.
TOTAL POSTS: 1999
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Re: X-Trail Diff Breathers & Diff Oil


 I am considering changing to a fully Synthetic diff oil at my 80,000km service, but I can't find a good quality replacement. Any advice ?

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BRETT72 - X235

12/Jan/2008, 11:38 am Link to this post Send Email PM   Send Private Message MSN
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29094
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Re: X-Trail Diff Breathers & Diff Oil


Brett,

I have considered this in the past as well and spoke to many mechanics, Nissan and Castrol themselves, all of them said, it won't make much difference if you use the genuine Nissan diff oil or the Castrol synthetic one. They're the same spec and having fully synthetic diff oil is not much of an advantage.

The Nissan diff oil lasts upto 80,000kms with no problems at all and I don't see the need to change it.

The diff problem I had has nothing to do with the diff oil type used. I would have had exactly the same problem with the synthetic oil had it been there.

That's just my opinion and those whom I spoke to about the diff oil.

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12/Jan/2008, 12:23 pm Link to this post Send Private Message MSN Blog
 
leongster Profile
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Date Registered: 07-2007
Location: Singapore
TOTAL POSTS: 46
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Re: X-Trail Diff Breathers & Diff Oil


quote:

bluexy wrote:

hi all has anyone used fully synthetic oil for their back diff on the exy?if so what brand and is there any difference.



I am running Mobil 1 75/90 synthentic in the rear diff. I Changed the oil at 16000km. As far as I can tell I have not noticed any difference in FC or performance.

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eddie


2004 X-trail 2.5 Auto.
12/Jan/2008, 4:42 pm Link to this post Send Email PM   Send Private Message
 
Eggins Profile
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X-TRAIL ENTHUSIAST
 


Date Registered: 08-2004
Location: Brisbane
TOTAL POSTS: 184
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Re: X-Trail Diff Breathers & Diff Oil


I used to use Castrol LSX90 (synthetic limited slip diff oil) in my old Datsun 1600 rally car, "CIG" locked diff! But so far haven't been able to warant its use in the XTrail. I think that standard recommended Castrol oil would be fine, as we just don't have the loads and temeratures of rally or race. Following the sheduled service intervals would be essential.
The Mobil sounds OK for towing and stuff, provided the price is OK.




---
Shawn and Belinda Eggins
2003 STR, K&N, Strut brace, Ground wires, Dunlop LM702's, Tint, Mud flaps, Tow, Nudge, Spots, Mats, Rear scuff plate
http://eggins.synthasite.com/
13/Jan/2008, 7:09 am Link to this post Send Email PM   Send Private Message
 
BRETT72 Profile
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X-TRAIL HOLIC
 


Date Registered: 10-2005
Location: Orange. NSW.
TOTAL POSTS: 1999
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Re: X-Trail Diff Breathers & Diff Oil


 For those interested, I just got this reply from Castrol re the oils. I enquired about synthetic oils available for the x-trail.

Hi Brett
Thank you for your e-mail.
Your on the right track.
Syntrax (75W/90)for the diff & transfer case.
Syntrans (75W/85) for the manual transmission.
If you have any further enquiries please contact the Technical Helpline
on 1300 557 998, Mon - Fri, 8.30am - 5.00pm.
Regards,
Product Applications & Projects
Castrol Lubricants
ph: 1300 557 998
fax: 03 9268 4394




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BRETT72 - X235

14/Jan/2008, 9:37 am Link to this post Send Email PM   Send Private Message MSN
 


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