Letting the cat out of the bag a bit, the thought may have already crossed my mind to do this. As well as some planning for my E61 build.
- You might be surprised to find that all of the SMG parameters stored inside the mss65 DME are also present in the mss60 DME. The map structure is identical as well as the naming conventions in the development version I looked at one time. Therefore, as long as both DME and DCT module are connected to each other via PT-CAN, we might be surprised and it actually just works. There's a guy in Germany putting a DCT in an E30 with an S85. E30 M3 - supercharged S50B32 [RNGTOY] - PistonHeads
Read the Sep. 21, 2013 entry. He apparently has the software from BMW somehow. I asked to him some time ago if he'd be willing to share it and he implied he might after they get it working.
- Pull all the drive shaft part numbers from ETK and you can deduce that the SMG box is longer than the E60 6MT box, by about 23mm. The E60 and E90 6MT box are identical externally for length. The DCT box is 32mm shorter than the 6MT. Therefore, in order to use a DCT in an E60 or E61, you need a drive shaft 55 longer. Or, have an adapter 55mm machined for the output pinion on the DCT and use longer bolts to engage the Guibo. Problem solved. These numbers may not be exactly correct as they are from memory, I have a spreadsheet at work I calculated it on and will post the actual numbers Monday.
- The transmission rear mount for the E92 6MT is the same part number as the 6MT mount for the E60. This means the mounting holes are spaced identically underneath the car. Therefore, the E92 DCT bracket will fit the E60's mounting holes.
The SMG harness is completely independent from the engine harness, so there shouldn't be much splicing involved. I've been thinking the same thing, but haven't dug into ISTA yet to pull wiring diagrams and pin connections.
- I sourced at DCT box pretty cheap, but haven't pulled the trigger. I've found a few on eBay for around $1500-1800 complete.
Would be nice to have a community effort going on with this. I tend to bite off more than I have time for and that needs to change with the new direction I'm heading in.