There is some talk on the internet that some Holdens have a T56 M12 or close ratio gearbox. I have been told by a Tremec specialist that Holdens are fitted with MM6 and there is only one ratio, including V2 Monaro.

Like to here if anyone "knows" different?

What is this box? and its ratio?
T56
TB 000166
92067135
TUET2107

Thanks