What happens when you completely bulletproof your drivetrain? (Solution found)
- Thread starter Chris@VargasTurboTech
- Start date
You will break it at the yolk where the Driveshaft screws into the Diff. This is the weak link on the stock 335 rear ends.
Fcuk. This is what I keep hearing. The M3 swap is a bit of a mission on a dct car.
This makes me that much more happy about my decision to go all in with the M3 drivetrain swap with the custom FD to work with the M3 GTS software. With adjustable LC and moderate power levels (500-600 whp) it should be damn near bullet proof.
Just go with the DCt M3 diff. It's 3.15FD. You will love the added acceleration from the lower gears. And with the DCT overdrive 7th, you should not lose much on cruising. It will bolt up, just need a driveshaft.
Apparently 2.81 is as high as you can go before the TCU perceives that the difference from estimated wheel speed is due to clutch slip and goes into limp mode or throws some other hissy fit.
This. If you're going to go through the trouble of the M3 drivetrain install, which is actually pretty simple, even with getting the driveshaft shortened, you can stay with the 3.15. Sure you'll sacrifice a little on the top, but spend another $500-700 and upgrade to the M3 GWS and supporting parts, use the M3 GTS flash and pick up adjustable launch control, drivelogic, and all the other little things that makes the M3 version of the DCT so much nicer. I do a few 1/2 miles events a yr so I opted to spend the extra $ for the 2.81 but it's not necessary.
Should be as simple as going in, and changing a few tables to keep the DME happy, but don't quote me on that.
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No more broken Diff Covers...
We also made an aluminum Guibo to adapt the Samsonas to the M-Factory Carbon Driveshaft we are running now.
We are considering making these diff lockdown kits for the 335 rear ends, and also aluminum guibo for race use only depending on demand. Most likely not right away, but we have all the drawings now for later use if needed.
We also made an aluminum Guibo to adapt the Samsonas to the M-Factory Carbon Driveshaft we are running now.
We are considering making these diff lockdown kits for the 335 rear ends, and also aluminum guibo for race use only depending on demand. Most likely not right away, but we have all the drawings now for later use if needed.
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How many designs, and 3D prints does it take to get the perfect aluminum guibo? About that many...
The 2.81 gear is 210mm and is a direct swap for the 3.15 gear. It came out of a 850i diff. Almost all the V8 BMWs of the 90's used 210mm gears.
