b4i4getit

Anybody know about the 2011 GS transmisson ? My cousin just got his Grand Sport and was asking about the transmission. Apparently the 2011 Z06 has carbon fiber syncros. Does he have the same transmission as the Z06 ? Dealer did not know what a syncro was.

JoesC5

The GS and the Z06 use the same transmission, except they have different gear ratios.

jschindler

Please tell me his dealer didn't tell him that his car has Carbon Fiber synchros

C6~Missle

LOL.. They used to use (or still do) syncros with fibers as a lining.. I remember reading that certain fluids would eventually weaken the fibers.. but not carbon fiber..

BSSN

http://forums.corvetteforum.com/c6-z...nsmission.html

b4i4getit

Actually they did. BSSN says they are across all cars for 2011. Just trying to determine if thats a good thing or not. Anybody know the pros and cons of carbon fiber synchros ?

BSSN

Supposedly the carbon-cone setup will eliminate the "cold nibbles" people often complain of. The TR6060 is a re-designed T56 with wider gears. This means that the syncros are narrower (everything must fit in the case still. Wider this = narrower that, basically). Thus, a better material is needed to achieve the same performance of slowing heavier gears with less syncro.

jschindler

Well, if I'm wrong I apologize. Are you sure they are Carbon FIBER though? Carbon and Carbon fiber are not the same thing necessarily. I know there is "carbon steel", so I'm not sure we are all on the same page.

Looks like an old dog (me) might learn something new today. But I'm just not imagining carbon fiber synchros.

Just found this.... http://partsworldperformance.com/Tre...Manual-Gearbox

BSSN

Indeed, "Carbon". No mention of carbon steel, carbon-fiber, etc.

JoesC5

I see mention of "carbon" and "carbon fiber" on many different transmissions. Possible people are using both terms to describe the some thing?

http://forums.corvetteforum.com/auto...ad-racing.html

Here, the poster is calling them "carbon fiber".

b4i4getit

I guess they are carbon coated.

http://ezinearticles.com/?First-2011...son&id=4337399

talon90

They may not be coated, but lined.

The details from the 2011 Engineering introduction simply noted them as Carbon Cone Synchros and a little detail discussion followed. They are not Carbon fiber, this I know but there are two methods of introducing Carbon in to the synchros and one as you noted is carbon coated but many have reported that there are problems with the carbon coating wearing off and causing problems in as few as 5,000 miles in the aftermarket (not Corvette but import). In the case of carbon lined, it is a discrete piece of sintered carbon that bonded to the brass and by all accounts this is a much better approach to the use of carbon in the synchros and seems to be the standard now.

b4i4getit

Can you confirm if his 2011 GS also has these special synchros or is this specific to the Z06 ?

talon90

Yes, his car has them.

GMJim

For 2010. First and second are triple cone. First gear has sintered bronze synchros and second gear has carbon fiber lined synchros. Third, fourth, fifth, sixth and reverse are double cone sintered bronze. No changes were made for 2011.
Jim

talon90

Engineering tells a different story.

SilverScorp

Great information! Maybe the 2011 version has both?

Radioman

For the '10 GS only 1st and 2nd gears have the carbon cone syncros..

GMJim

I get my info from Tremec the manufacturer. I recently pulled a 2010 GS trans with 10,000 miles out to replace the bronze synchros with carbon fiber. The only synchro that was carbon fiber was second. The rest were sintered bronze. It now has carbon fiber in 2nd, 3rd, and 4th. I checked with Tremec before posting this to see if the 2011's were the same and they told me they were unchanged from 2010. I'll check again with engineering after the holidays to make sure.
Jim




Second Triple cone


Third Double cone


Fourth Double cone

talon90

Thanks for the follow-up Jim. It is quite possible that the change was incorporated as a running change in 2010 model transmissions and not highlighted by Corvette until the 2011 model introduction. That would explain the difference in the timing information.

Paul