if so which is the better box? in the vz commodores with 6spd manuals do they use same box in the V6 as in the V8`s? also what kinda grunt are they rated for, cheers.
Ok well the T56 transmission is a Tremec transmission used by General Motors. The Getrag 6 speed manual is not a T56. The Getrag 6 speed is used by Toyota, Mitsubishi, Dodge, Ford, and it is also used by Pontiac (GM) and many others. But each company uses a different version of the manual. So it depends on exactly which Getrag 6-speed variant it is.
The VZ V6's use a D173 Aisin 6-speed Manual Transmission. This transmission is built in Japan and the SV6 was the first car in the world to use it. Ratio's are as following:
The VZ V8's use the original Tremec T56 6-speed Manual Transmission which has been in use since the VT. Gear ratio's are:
The VZ Monaro however uses an M12 version of the Tremec T56 6-speed Manual Transmission which generally in the GM empire is not used in applications of much over 400hp, but it can handle more. Gear ratio's are as following:
The M12 T56 would be the strongest of the transmissions that Holden use.
thanks for reply chief, apreciate it. ive bought a box which is coming from over east, the ad reads like this-
"Getrag 6 speed manual gearbox to suit alloytec sv6 VZ commodore
Complete box less clutch and shifter nearly new no damage at all."
what do you think?
Hmm make sure its not the 5 speed Getrag manual as used by Holden just in case.
Other than that, they may have confused it with the 6 speed Aisin manual from the SV6 as its a little known transmission. I would say this would be the case if its through private sale.
Or if it actually is a Getrag 6 speed, it would be a BMW Getrag 6 speed or a Ford Getrag 6 speed.