The ZF S6-37 is a 6-speed manual transmission manufactured by ZF Friedrichshafen AG. It is designed for longitudinal engine applications, and is rated to handle up to 370 newton metres (273 lbf⋅ft) of torque
E46 M3 is a different gear box as you say due to being to wide for the E85/86 transmission tunnel.
E46 330 is the same ZF as the Z4 in 3.0 and M although different ratios..
