| davidcctx |
| Are most of the CVT failures on AWD or are they failing on FWD as well? I am about to pull the trigger on a 2006 with 34,000 miles, but the thought of a $7500 CVT failure has me a little gun shy. |
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| Eric L. |
| Most cases of CVT failure here have been linked to failure of the AWD system - usually caused by slow leaks that dry up the gears in the transfer or rear differential. Check for leaks - if there are none, you are good to go. There are many threads here on how to check for CVT/transfer leaks - use the search. Some of them have great pictures too. |
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| zebelkhan |
quote:
Originally posted by davidcctx
Are most of the CVT failures on AWD or are they failing on FWD as well? I am about to pull the trigger on a 2006 with 34,000 miles, but the thought of a $7500 CVT failure has me a little gun shy.
$7,500?????????????
I thought it was only $6,000......:D |
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| davidcctx |
| Just to clarify, the Murano i am looking at is FWD not AWD. So it has no transfer case or rear diff. |
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| zebelkhan |
quote:
Originally posted by davidcctx
Just to clarify, the Murano i am looking at is FWD not AWD. So it has no transfer case or rear diff.
From what I understand, CVT failures are rare but because costs are high the problem gets magnified. I also understand that there are less CVT failures attributed to FWD MOs. But it is hard to say because a true comparison should take into account the total of FWD vs AWD on the road and I am not sure if that study exists. |
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| RonB |
| I have an 03 FWD with 75K miles on it with no problem related to the CVT.(knocks on wood) |
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| njjoe |
quote:
Originally posted by Eric L.
Most cases of CVT failure here have been linked to failure of the AWD system - usually caused by slow leaks that dry up the gears in the transfer or rear differential.
Usually caused by slow leaks in the rear diff?? Since when?? The rear diff has shown to be virtually bullet-proof on the AWD MOs.
Most CVT failures appear to be linked to oil starvation caused by seal failure, regardless of drive wheel configuration.
-njjoe |
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| Eric L. |
quote:
Originally posted by njjoe
Usually caused by slow leaks in the rear diff?? Since when?? The rear diff has shown to be virtually bullet-proof on the AWD MOs.
Most CVT failures appear to be linked to oil starvation caused by seal failure, regardless of drive wheel configuration.
-njjoe
A couple years ago one owner had the rear diff EXPLODE into pieces. Probably due to a dry diff. They were some pretty dramatic pictures, posted here on the forum. |
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| njjoe |
quote:
Originally posted by Eric L.
A couple years ago one owner had the rear diff EXPLODE into pieces. Probably due to a dry diff. They were some pretty dramatic pictures, posted here on the forum.
That was one failure out of how many MOs??
The rear diff has been a virtually trouble-free assembly. There is no evidence that it is a contributing factor in the CVT failures.
We know now that the majority of CVT failures are preceded by leaking output-shaft (axle) seals.
-k |
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| Eric L. |
quote:
Originally posted by njjoe
That was one failure out of how many MOs??
The rear diff has been a virtually trouble-free assembly. There is no evidence that it is a contributing factor in the CVT failures.
We know now that the majority of CVT failures are preceded by leaking output-shaft (axle) seals.
-k
I am not sure what you trying to get at here. I never said ALL failures are caused by the rear diff. I just said that leaks can occur at both locations, and both would be bad for the CVT. If I remember the "exploding rear diff" thread, the entire transmission/transfer/driveshaft/rear diff was replaced.
I have posted many times about the front transfer/CVT leak, so I just wanted to throw a bone to the rear which can also lead to issues (albeit more rarely). |
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| njjoe |
quote:
Originally posted by Eric L.
I am not sure what you trying to get at here.
I was just trying to correct a post that contained misleading information.
You claimed that CVT failures are "usually caused by slow leaks that dry up the gears in the transfer or rear differential".
That is not true. The failures are usually caused by seal leaks in the transfer case and the CVT itself, not the rear dif.
It's no big deal. I just want the members to get the clear picture. We don't want people incorrectly believing there is an issue with the rear diff. It is one of the few driveline components that has been trouble-free.
-njjoe |
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| Eric L. |
quote:
Originally posted by njjoe
I was just trying to correct a post that contained misleading information.
You claimed that CVT failures are "usually caused by slow leaks that dry up the gears in the transfer or rear differential".
That is not true. The failures are usually caused by seal leaks in the transfer case and the CVT itself, not the rear dif.
It's no big deal. I just want the members to get the clear picture. We don't want people incorrectly believing there is an issue with the rear diff. It is one of the few driveline components that has been trouble-free.
-njjoe
Well I still think a bad rear diff can eventually damage the transfer/CVT assembly. Of course front transfer leaks are more common - this is already posted above (with a suggestion to search for pictures of how to check for such leaks).
I also remember a post maybe a few months ago where the rear diff failed (but only after it was making noise) - in that case there was no news of whether it caused other driveline damage as well, but I am fairly certain in the first "exploding diff" story posted here years ago, everything was replaced as mentioned above.
Sorry if my initial post was confusing. For FWD, there is no transfer case, so it would only be a CVT leak or an axle seal leak. |
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