Some say the 711.430 is the better stronger gearbox (though to be fair I can not see much of a difference between the 722.412 and the .430 when I've had them in bits). The .430 was used in W124 300Ds and I think perhaps for the 280 six cylinders (probably M103s).

There is a possible problem with the flywheel / clutch combinations for the M104 - around that time they started to use dual flywheels with slightly different gearboxes to suit. I'm not 100% sure - so you need to check with people with a better memory than me - it could be that the dual mass flywheels were purely M104 and the M103's conventional flywheels but there was also a transition period for the M104 where it started out with CIS (like the M103) and ended up with more EFI computery stuff and wasted spark ignition - so it might not be that simple.

I'm fairly sure an appropriate question / link to the performance section of the forum will clear things up.

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!