[BaylorCamaro]

A family member of mine has a 2015 C7 Z51 with the automatic 8 speed. Last track event I brought it to the track along with my ZL1, it was in the mid 90's outside and I was running 20 minute sessions in my ZL1. The first session in the C7 was only 15 minutes and I had zero issues. After about 45 minutes I did a 20 minute session in the C7 and the transmission overheated, causing the transmission to prematurely upshift despite me being in manual paddle shift mode the whole time. I'm assuming it was doing this to help cool & protect the transmission.

I was a bit surprised by this since the Z51 is supposed to be the "performance package" with the added cooling. Further more I have done extended stints in my A6 ZL1 well over 20 minute sessions in the same or hotter weather with zero transmission issues. The C7 was bone stock and my ZL1 is modified but no changing in the transmission cooling, so it should be seeing more abuse than stock. I will say, even with my ZL1 being upgraded with power, suspension, wheels and tires I preferred tracking the STOCK C7 Z51, up until the point that it overheated..

[MA2010SS]

I would not be concerned at all. A little over 8600 Z06 models were sold in 2015 you are hearing about a couple cases throughout America of something major failing. 1% of that 8600 sold would be 86 cars. Are there 86 major failures out there? Remember the first Camaros that came out M6 had output shaft failures. Every manufacture will have an issue at some point

[Noob]

Originally Posted by MA2010SS

I would not be concerned at all. A little over 8600 Z06 models were sold in 2015 you are hearing about a couple cases throughout America of something major failing. 1% of that 8600 sold would be 86 cars. Are there 86 major failures out there? Remember the first Camaros that came out M6 had output shaft failures. Every manufacture will have an issue at some point

The 8speed auto is not available at the chevy side in germany...manuals only.

Yesterday i had to refill my "valveprotect" fluid in the little hatchback and i suddenly thought about if this system could help DI engines not to collect oil debris from the crankcase at their inlet valves.
We use that system in europe especially in germany to protect the valves when using LPG.
I have now 63000km on it and valves are clean. Due to its dosing unit and sequential injection for each cylinder it works well with any engine size.
my 1,4ltr. needs 0,5ltr at about 5000km depending on average rpm´s you drove. For a V8 i suggest 2 canisters or a bigger one ,lol.
http://www.prinsautogas.com/en/produ...valvecare.html
this is the system which i use, was a bit cheaper but works well.
http://www.valve-protector.de/22.html

With LPG you have a relative similar problem at inlet valves because the gas is not wet, it´s ****ing dry and you can see that also at the spark plugs after a while, dry and seems like a bit rusty. This makes it easier for the oil particles from the crankcase to dirt up your inletvalves.
With spraying this mixture of oil/alcohol in the inlet ports and valve shafts the debris is washed away.

I saw a Ford Ecorusts and a AUDI TFSI at the inlet side, both were dirty and ****ing dry !

[Bhobbs]

Originally Posted by BaylorCamaro

A family member of mine has a 2015 C7 Z51 with the automatic 8 speed. Last track event I brought it to the track along with my ZL1, it was in the mid 90's outside and I was running 20 minute sessions in my ZL1. The first session in the C7 was only 15 minutes and I had zero issues. After about 45 minutes I did a 20 minute session in the C7 and the transmission overheated, causing the transmission to prematurely upshift despite me being in manual paddle shift mode the whole time. I'm assuming it was doing this to help cool & protect the transmission.

I was a bit surprised by this since the Z51 is supposed to be the "performance package" with the added cooling. Further more I have done extended stints in my A6 ZL1 well over 20 minute sessions in the same or hotter weather with zero transmission issues. The C7 was bone stock and my ZL1 is modified but no changing in the transmission cooling, so it should be seeing more abuse than stock. I will say, even with my ZL1 being upgraded with power, suspension, wheels and tires I preferred tracking the STOCK C7 Z51, up until the point that it overheated..

There's a reason why GM recommends the M7 if you are serious about track work.

Originally Posted by MA2010SS

I would not be concerned at all. A little over 8600 Z06 models were sold in 2015 you are hearing about a couple cases throughout America of something major failing. 1% of that 8600 sold would be 86 cars. Are there 86 major failures out there? Remember the first Camaros that came out M6 had output shaft failures. Every manufacture will have an issue at some point

And how many people who bought a Z06 push it as hard as Randy Pobst? I'm guessing fewer than 1%.

[BaylorCamaro]

Originally Posted by Bhobbs

There's a reason why GM recommends the M7 if you are serious about track work.

I get that, but at the same time I'm tracking a 4,200+ pound, 580+ rwhp Camaro with an A6 transmission and have had zero issues. One would think that the new transmission would be more efficient and less prone to issues. It's clear the Corvette has issues getting enough air to the transmission.

[Bhobbs]

Originally Posted by BaylorCamaro

I get that, but at the same time I'm tracking a 4,200+ pound, 580+ rwhp Camaro with an A6 transmission and have had zero issues. One would think that the new transmission would be more efficient and less prone to issues. It's clear the Corvette has issues getting enough air to the transmission.

Isn't the 8 speed about the same size as the 6 speed? Could be an issue with getting enough ATF around the gears to keep it all cool if it's too densely packaged.

[SuperSound]

Originally Posted by Bhobbs

Isn't the 8 speed about the same size as the 6 speed? Could be an issue with getting enough ATF around the gears to keep it all cool if it's too densely packaged.

More probable that packaging in the C7 is the issue. The ATS-V and CTS-V have not had any complaints.

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[whiteboyblues2001]

Originally Posted by SuperSound

More probable that packaging in the C7 is the issue. The ATS-V and CTS-V have not had any complaints.

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To elaborate on your point, the transmission in the C7 is directly conected to the differenetial in the rear of the car with a shaft connecting the transmission to the engine. The Camaro will have a more tradional setup with the transmission directly connected to the engine and a shaft that connects the transmission to the differential. Some C7 folks have theorized that the exahaust is too close tot the trans in the C7. Also, the transmission cooler is completely different in the Camaro vs. the C7 as well.

[SuperSound]

Originally Posted by whiteboyblues2001

To elaborate on your point, the transmission in the C7 is directly conected to the differenetial in the rear of the car with a shaft connecting the transmission to the engine. The Camaro will have a more tradional setup with the transmission directly connected to the engine and a shaft that connects the transmission to the differential. Some C7 folks have theorized that the exahaust is too close tot the trans in the C7. Also, the transmission cooler is completely different in the Camaro vs. the C7 as well.

Exactly

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[Noob]

as in this video i saw a ecoboost and a TFSI engine too.
It read only Toyota has a better system; they use DI and intake injection combined.
The oil separator in the GEn6 will only prevent the inlet valves for the oil out of the crankcase but not from leakage oil from the valveshafts and normal debris from engine work.
To keep those DI engines more clean you have to drive them very sporty with high rpm´s but a 8speed keeps the rpm´s mostly in areas which are build up this shit quickly.

[DevonK]

VW does indeed use a dual port/DI injection system on the Golf R and maybe other models - but only in Europe. In typical VW "let's screw North America" style it went with a cheaper DI-only engine variant for the NA Golf R.

[liberty]

These problems, and others, are not new to Chevrolet. I had engine problems in a 1969 Chevelle SS 396, a 1970 Impala 400cu in small block, and a 1980 Camaro Z28 (350cu in). Lack of sufficient engineering, and quality control, are in Chevrolet's DNA. Wouldn't be much of an issue if Chevrolet corrected the problems while in warranty, but they send out their lawyers to deny customer remedy. I've never had similar quality lapses, or warranty coverage, in Toyota products.

[mcsoul]

Originally Posted by liberty

These problems, and others, are not new to Chevrolet. I had engine problems in a 1969 Chevelle SS 396, a 1970 Impala 400cu in small block, and a 1980 Camaro Z28 (350cu in). Lack of sufficient engineering, and quality control, are in Chevrolet's DNA. Wouldn't be much of an issue if Chevrolet corrected the problems while in warranty, but they send out their lawyers to deny customer remedy. I've never had similar quality lapses, or warranty coverage, in Toyota products.

I had an '80 z28 with the borg 4 speed, actuated induction flaps and glass t-tops. To this day I love and miss that car. But you're right lots of engine and transmission problems, but all my cars I'd ever bought back then had problems.

[rayhawk]

Originally Posted by liberty

These problems, and others, are not new to Chevrolet. I had engine problems in a 1969 Chevelle SS 396, a 1970 Impala 400cu in small block, and a 1980 Camaro Z28 (350cu in). Lack of sufficient engineering, and quality control, are in Chevrolet's DNA. Wouldn't be much of an issue if Chevrolet corrected the problems while in warranty, but they send out their lawyers to deny customer remedy. I've never had similar quality lapses, or warranty coverage, in Toyota products.

And Toyota makes low power, safer designs, and sells them to people who could care less about performance. Don't you think it is more challenging to build a Camaro with 455 hp that people are going to beat on than a 150 hp Corolla?