Are we reading the same forum? Do you see the reapeated issues 2005 C6 guys have with rear ends that GM refuses to repair under warranty? It was such a great CAD design that GM changed the diff in mid year production. The fact that you haven't had any issues is the rare case and not the norm. Even if 10 guys chimed in to say what you say, there are still 100 more that had rediculous issues even on stock cars such as blown rear ends.....using stock street tires no less.

I dont know but I would think that the majority opinion is what should count here. You must be one of those guys who got 35k miles from the runflats and never goes over 3k on the tach.

To date I recall a ton of guys having their harmonic balancer fall off and in one case the same guy had 3 come off after having GM repair it. Was the CAD design working then? I guess none of those incidents count since you made it to 16k.

It is a sexy car though.

 

There are 10 reports here on this forum of broken rears.

7 out of that 10 presumably had either "tuning" alone. Tuning and minor mods like exhaust. Or tuning along with major mods such as heads and cam.

Some were making well above stock power. One of those reporting even has a video of himself making a near 200mph pass in Bahrain. Most went down after mods and/or "tuning" .

I have found only two, well three if you count the one which went out presumably due to "abuse"/ drifting, reports on this forum of a bone stock C6s differential failing.

I have seen no reports on this forum of GM refusing to repair any of the broken rear ends in stock or near stock C6s


Larry_Chip ........broken rear after tuning.
Zippin Zee..........broken rear after tuning.
Mach5.......Drifting??? "Tires suck and the only lasted 5k. I don't do burnouts or donuts although I do drift." http://forums.corvetteforum.com/show...3&page=1&pp=20

rmitchell242.... 493 RWHP 439RWTQ on Nitto555RII tires.
Isaiah48.......bone stock
shw time.....480hp to the rear on drag radials
Smoove.........."my buddy, with full exhaust, no cats, and tune 2200rpm launch attempt,...and he got some wheel hop, and stayed in it....."

brn-c6......... Heads/Cam, makes a 200mph pass...http://forums.corvetteforum.com/show....php?t=1204710

Cartek...........After running 11.8 on ET Streets with a list of other mods.

DrivnXcitment.........05 BONE STOCK C6 Z51 6spd. Dropped the clutch at 1100-1200 RPM.

Considering the number of C6s in this forum, 10 failures is a relatively miniscule rate of failure, especially when one factors in the fact that many of these failures did not occur in cars making stock power, had aftermarket programming done to reduce or eliminate "torque management" and/or were running on soft compound tires. Wheel hop was described as the culprit in more than one instance. And also reported in one of the instances where "tuning" to reduce or eliminate "torque management" had been done.

Worthy of mention is that there have been reports of rear end issues, albeit outside of the differential, in the C6 Z06 as well.

Harmonic balancers falling off???? I don't know about "a ton" but there have been a few reports of the incident occuring on cars owned by members of this forum. The affected VIN range was Built Prior to VIN Breakpoint 55111039.

http://forums.corvetteforum.com/show...0&postcount=16

 

Read the 2006 Consumer Reports auto issue. The stats are plain for anyone to see, first year cars avarage significantly more problems than later years. That doesn't mean you should never buy a first year car, it's just one factor that you should consider.

 

The vast number of broken diffs were not had by forum members so using forum statistics to say if 10 breakages is miniscule is probably not the best way to describe how severe the problem is. A better statistic is comparing how many C5 diff. breakages were had by form members on the street with 100 more HP. I have no wheel hop on my C5. Further there were no rear diff changes other than a cryp case for the Z06 that I am aware of. So why did GM make a production change? And when did the production change occur???...first year.

The vast number of harmonic balance issues were not reported by forum members and GM had made changes into the production year on that also. There is a GM memo on the misdesigned harmonic balancer set-up that required a washer to be installed. All of these issues were designed out in the first producton run and would have been bypassed if you didnt buy the first year of the car.

For that matter, the wheel hop issue still hasn't been addressed but some companies are working on a solution such as BRM fabrication. By the 4th/5th year of this car there will be major revisions to it and all those looking to get a used C6 will avois the 'bad' years with the weak rear and porly tuned rear suspension. They will also see if it is a 2005 if it falls within the 'bad' vin range. The engine wil swap with no other C6 due to the reluctor wheel swap. The Z06 427 will work with all other C6's but this one.

Just my opinion while comparing this car to the 97 that has a weaker cam, crappy heads that no one wants because of the perimeter bolts, a PCM that half the tuner software doesnt work with, a limited range MAF, and dont forget the lack of an LS6 manifold.

 

I believe the oil consumption in 2001 was on the Z06 LS6 motor, which was a first year item. I had one of these cars and was very lucky that mine did not use oil and need a ring replacement. Many, many 2001 Z06s did.

Don't forget the dreaded DBS in the 2005 C6 manual cars.

Later,

 

Balloon juice!

 

I drove my 2000 C5 for over 100K miles and only changed the oil and one head light lamp. I drove the crap out of that car. It was bullet proof. It was a Z51 MN6. I traded it in for $18K for my 2005 DSOM F55. I've only got 4K miles on this one but it kicks *** so far. Opened up a can of whupp a$$ on an 06 911 today and loved every minute of it!!!