Quote:
Originally Posted by wss4
I am trying to understand what exactly are the differences between the z4m and 3.0si transmissions. My second gear synchro is getting tired, and I have found a very low mileage transmission from a 3.0si. Will this work in a z4m?
From another thread:
The Z4M uses the GS6-37BZ-TJEE (BMW part number 23007837983)
The 3.0si Z4 uses the GS6-37BZ-TJES (BMW part number 23007565178)
Does anyone know the significance or the last 4 characters?
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I know for sure that the M transmission has the pivot bearing in the crankshaft, checking on realoem 3.0si seems to have the same thing.
I think that the Z4M transmission have different internals, same ratio though.
You shoud ask
http://wanganstyle.com/
He seems to know his stuff and rebuilds transmissions regularly.