24V AWD Swap Knowledge Base

[The Dark Side of Will]

Going to make me whip it out, eh?
E90 335i DZ:

http://www.realoem.com/bmw/enUS/showparts?id=VB73-USA-03_2006_E90_BMW_335i&diagId=23_0926#23007571423

E60 LCI 550i BZ

http://www.realoem.com/bmw/enUS/showparts?id=NW53-USA-11_2005_E60N_BMW_550i&diagId=23_1036#23007571425

[Nisse Järnet]

Nope... at least not per the ETK at RealOEM. Six cylinder cars got the DZ and 8 cylinder cars got the BZ. E60 & F10 V8's got the BZ, E60 & F10 535i's got the DZ, E90 335i's got the DZ

GS6-37BZ (new designation according to BMW Group Standard GS 90007)
G drive
S Transmission type. S = Manual transmission. A = Automatic transmission
6 Number of forward gears
- = Standard with manual gearshift. HP = Hydraulic planetary gear
37 Transmission type. 26 = D-transmission. 31 = C-transmission. 39 = F-transmission. 37 = H-transmission. 53 = G-transmission
B Gear set. B = Petrol/gasoline gear ratio. D = Diesel gear ratio
Z Code letter of transmission manufacturer. G = Getrag. Z = ZF (Zahnradfabrik Friedrichshafen)

[iXguido]

Even the e90/e91 335d was offered as a manual over here if I'm not mistaken.

[iXguido]

I haven't found a diesel with a manual transmission after the E46

They're everywhere overseas.

[The Dark Side of Will]

I haven't found a diesel with a manual transmission after the E46

[The Dark Side of Will]

Nope... at least not per the ETK at RealOEM. Six cylinder cars got the DZ and 8 cylinder cars got the BZ. E60 & F10 V8's got the BZ, E60 & F10 535i's got the DZ, E90 335i's got the DZ

[Nisse Järnet]

Here's a .pdf with (modest) info about the T-case: http://www.bmwmotorsports.org/pdf/e7...Powertrain.pdf

Also, I was just looking through RealOEM to see which applications had the GS6-53BZ and which had the GS6-53DZ. It looks like the 6 cylinder turbo cars got the DZ and the 8 cylinder cars got the BZ. I'm not entirely sure of the ratios, as I can't find consistent info on them on the internets.

I *think* the case is that the DZ has 5.03 first and 0.84 6th, while the BZ has 4.03 (or 4.30?) first and 0.87 sixth. If I have both because I need the 6 cylinder rear housing with the 8 cylinder front housing, I should be able to build my desired gearset with the tallest gears. Interdasting.

BZ is petrol and DZ is diesel if im not mistaken?

[The Dark Side of Will]

Here's a .pdf with (modest) info about the T-case: http://www.bmwmotorsports.org/pdf/e7...Powertrain.pdf

Also, I was just looking through RealOEM to see which applications had the GS6-53BZ and which had the GS6-53DZ. It looks like the 6 cylinder turbo cars got the DZ and the 8 cylinder cars got the BZ. I'm not entirely sure of the ratios, as I can't find consistent info on them on the internets.

I *think* the case is that the DZ has 5.03 first and 0.84 6th, while the BZ has 4.03 (or 4.30?) first and 0.87 sixth. If I have both because I need the 6 cylinder rear housing with the 8 cylinder front housing, I should be able to build my desired gearset with the tallest gears. Interdasting.

[Nisse Järnet]

Xdrive transfer case actuator has hall sensor on the motor axle (20 pulses / rev) and directional sensor that tells the direction the motor is rotating. Also there's temp sensor etc.

There is no actual position information available without some mathematics. However - I'm going to install position sensor on the actuator axle that turns the transfercase axle. That way it hopefully can be controlled with autronic (this is not my strongest area :D)

I'm probably going to use speed sensors in rear diff (original) and another one at the front diff (maybe at the pinion flange). Then maybe control it with slip% (if it reacts fast enough) or just to be locked all the time when @ WOT. And I really do hope that it never ever opens during WOT. That could be catastrophic. When I tested the car with rwd only there was zero traction @ wot no matter what speed. :D

You could set up the SM4 traction control to act like a backup if the AWD malfunctions :)

[mw044]

Xdrive transfer case actuator has hall sensor on the motor axle (20 pulses / rev) and directional sensor that tells the direction the motor is rotating. Also there's temp sensor etc.

There is no actual position information available without some mathematics. However - I'm going to install position sensor on the actuator axle that turns the transfercase axle. That way it hopefully can be controlled with autronic (this is not my strongest area :D)

I'm probably going to use speed sensors in rear diff (original) and another one at the front diff (maybe at the pinion flange). Then maybe control it with slip% (if it reacts fast enough) or just to be locked all the time when @ WOT. And I really do hope that it never ever opens during WOT. That could be catastrophic. When I tested the car with rwd only there was zero traction @ wot no matter what speed. :D

[The Dark Side of Will]

I think there's a sensor in the actuator motor so the TC controller knows where the actuator is.
I would try to control it directly with the ECU and front/rear speed sensors like my traction control setup for example.
I can be wrong since I haven't looked interesting the xDrive yet but I think mw044 has :)

Yeah, it looks like a DC motor with an encoder... not hard to drive.
I was hoping there were speed sensors on the front and rear outputs, but I guess the OE controller gets wheel speed data over CAN. For mine I could pirate the VSS in the rear diff and maybe install a pickup on the front drive sprocket teeth inside the unit to see front shaft speed.

In building my own controller, I'd be able to set up a launch function. I envision this as pushing a momentary switch for 3 seconds with the vehicle stopped or at a very low speed, which signals the controller to go to 100% lock and maintain that until vehicle speed rises above 15 mph (for example).

I plan to use an accelerometer to map lockup vs. lateral or longitudinal acceleration. I might eventually try a steering angle sensor for a little more input.

[The Dark Side of Will]

If I were going to run a $3000 ViPEC, I'd definitely have it handle the T-case.

An MSS52 with a tune should be fine for me.

[Nisse Järnet]

Right now I'm planning to use the stock MSS52 to run the S62.

Oh ok, then something like you said makes more sense :)

[The Dark Side of Will]

Right now I'm planning to use the stock MSS52 to run the S62.

[Nisse Järnet]

I think there's a sensor in the actuator motor so the TC controller knows where the actuator is.
I would try to control it directly with the ECU and front/rear speed sensors like my traction control setup for example.
I can be wrong since I haven't looked interesting the xDrive yet but I think mw044 has :)