GS6-53DZ swap to GS6-45BZ?

[sonicnofadz]

Very cool, thank you. I haven't sourced a transmission yet but I have picked up a shift lever and support bracket from both an M car and a non-M. The mounting points look like they're a match; however the casting is different in the center section. The selector rod is also different. I believe the M lever sits higher up. I will try and get a couple of pics and measurements to compare. I think you're right on the driveshaft too. I'm wondering if it's possible to combine the front section from one model and rear section from another to get the correct length.

 

[sonicnofadz]

Very cool, thank you. I haven't sourced a transmission yet but I have picked up a shift lever and support bracket from both an M car and a non-M. The mounting points look like they're a match; however the casting is different in the center section. The selector rod is also different. I believe the M lever sits higher up. I will try and get a couple of pics and measurements to compare. I think you're right on the driveshaft too. I'm wondering if it's possible to combine the front section from one model and rear section from another to get the correct length.

For an e9X there are a lot of different length driveshafts available, I already have two out of the three of these (for large pumpkin diff):

driveshaft for e90 n55 manual part# is 26107614408 L=1485MM
driveshaft for e90 n54 manual part# is 26107614384 L=1470MM
Driveshaft e90 06-07 auto transmission part #26107614433 L=1453MM

I suspect that the overall transmission length is probably pretty close to the gs6-53, since the regular flavor 45 was a bit shorter compared to the 53, but has been elongated with the M version of the 45. I will soon find out...yeah as for the shifter, I'd like to find an OEM solution, but if I have to custom fab a shifter or the rod, then so be it (I have access to tig and mig in my shop). The shifter mounting points are definitely the same on the back of the trans, much of the hardware part numbers on real oem are the same between the platforms, but the shifter parts are are all different from e90/n54 e90/n55 and f80/s55

 

[Efp1103]

Following the crap out of this thread. I’d love to find a workable OEM manual trans upgrade. My 53BZ is starting to show its age.. Any updates on this since last November?