I would like to upgrade the torque of my 2010 GTC to today figures.
However as stated by ZF, the 6HP26A61 transmission that is used in 2010 GT(c)'s is restricted to an input torque of max. 650Nm. When torque converter W280S-2GWK is used, that is.
However f.i. the 2010 Speed & SS generate more torque than that from stock.
Can anybody please explain me how much torque I SAFELY can throw at the standard transmission (560Hp) without bringing my transmission in jeopardy?

 

I'm putting out about 640hp and 610tq on a stock transmission in an 07 GTC and have had no issues in the roughly 7k miles since modifications.

 

Having had a lot of experience with the 911 tiptronic equivalent and having had to have the trans extensively modded to take 650 bhp & 1000nm torque I can say its the clutch packs that will show problems to start with.
more than likely you will get over revs when you change gear on full power. The revs will rise considerably 500 or more then die down. It feels just like a manual trans clutch slipping.
There will be 6 clutch packs in the box.......older autos had what were called clutch bands, but this and most other modern semi-autos use clutch plate packs. To take more power they normally have to have larger packs, more of them and made of carbon. Control to the solenoid actuators is normally reprogrammed and pump pressure increased.

This was with the 996 911 turbo Porsche Tip Box not Bentley. FYI the Porsche tip box was actually made by Mercedes.