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Discussion Starter #1
In the first 700 miles on my 2002, my dealer has attempted to repair a leak on the backend (at the tranny/rearend connection). First it was tranny fluid, then rear end fluid and then tranny fluid again. I haven't tested the last "repair" as I've put it under the blanket for the winter.
My dealer says that GM reports only 3 leaks similar to mine. I'm wondering if anyone else has had or is aware of this problem (or am I just one of those unlucky few)? If it wasn't for the awesome power and handling I'd be even more pissed with this quality problem.
 

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A. Martinson,

First off welcome aboard youv'e come to the right home. Second no your not alone, 01's have this problem also and there is a GM service bulliton on it. Get back to dealer to document if car is up for winter to repair in spring.

Good luck and enjoy.......

:cool:
 
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Go back to the dealer and tell them they are either outright liars or do not know zip about Corvettes.

The trannie and rear end leaks have been many and across the C5 M.Ys.

My '99 has both MN6 and left rear end seal leaks and it does get me ticked that after all the complaints, repairs and still the newest model C5s has the same failures as 4 year old models.


A. Martinson said:
In the first 700 miles on my 2002, my dealer has attempted to repair a leak on the backend (at the tranny/rearend connection). First it was tranny fluid, then rear end fluid and then tranny fluid again. I haven't tested the last "repair" as I've put it under the blanket for the winter.
My dealer says that GM reports only 3 leaks similar to mine. I'm wondering if anyone else has had or is aware of this problem (or am I just one of those unlucky few)? If it wasn't for the awesome power and handling I'd be even more pissed with this quality problem.
 

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I had a leaky left rear seal on both of my Z06's. Both were repaired by the dealer.

Hopefully one of our Vette Drs. will read this post. I remember my mechanic saying he used a special sealer when he reassembled the rear.

BTW....Welcome to the forum!! :cool:
 

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Hi there,
Facts here, please, which seal was leaking?? There are 3 shaft seals, and 2 o ring seals for the end plates.
2 shaft seals are for the output shafts, and 1 is for the input from the transmission to the diff.
As for the transmission, was it a seal or the separation lines of the case??
From what you are saying, you have had 2 different conditions.
Also, there are 5 different places for leaks on c5 from the differential, as I listed above.
We do use anerobic sealer, above the orings that is required when doing a side plate seal.
However, there is revised orings in process, and are coming, although, I have not been told when.
So, I would need alot more information on what exactly the dealer has told you.
Yes, rear seal, and orings are common, however, not being ignored by Corvette engineers.
Besttoall, c4c5:z:
 

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I had some clear fluid under my car ONE time. After getting other responses here, I checked the fuild level (was OK) and have been monitoring it since. I have never had any fluid of any kind since. Some said they too had it once and figured it was overfill from the factory.

Still watching.
 

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Discussion Starter #8
Wow, what great feedback! First, thanks to all for their comments. Obviously these leaks on the rear end are more prevelent than my dealer or their contacts at GM are aware of (or want to admit to). I will print your comments and questions and meet with their service folks to try to get answers. (I'll also suggest they plug into this forum as I see a few techs, like C4C5specialist, to learn more about the issues owners are finding- this forum is a fantastic source of the real happenings.)
To fill in a little more info, the GM tech feedback to the dealer was that possibly there was a burr on the edge of one or more shafts and recommended that they check and deburr the ends of all of the shafts. (This was after the second repair. Since it leaked again (tranny fluid), I'm not sure that was the problem)). Each time of the repair, they have replaced the 3 shaft seals- part nos. 12455044, 45, & 56 and they've used a part no. 10953466 sealer. As to where the leak is showing up, it's at the separation line between the tranny and rearend, whether it was tranny or rear end fluid. All 3 times, it has only taken 60-100 mile drives to show the problem.
Thanks again for everyones help.
 
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