24V AWD Swap Knowledge Base

[The Dark Side of Will]

2.47 front diff from E46 330xd purchased. Just asked the seller if he has the 2.47 rear as well.

I'll compare to see if these gears will go into the E53 case. If so, that will work out great. I'll throw a Quaife in while I'm at it and have an immensely expensive front diff!

[The Dark Side of Will]

Actually the E34 pan hits the rack before the diff, but notching the pan won't help since inner CV and the diff then will interfere with the rack instead.

Right... the diff is the thing that can't be fixed ;)

[Nisse Järnet]

Oy...

No, it's the diff, not the oil pan that runs into the steering rack

Actually the E34 pan hits the rack before the diff, but notching the pan won't help since inner CV and the diff then will interfere with the rack instead.

[The Dark Side of Will]

Oy...

so the needed bits would be:
24v motor mounts like an e28 m5 mounts, or something like revshifts with
e36 brackets (maybe e34?).

No, custom mount arms

e34 oil pan (to be notched to clear the steering rack)

No, it's the diff, not the oil pan that runs into the steering rack.

use a z3 gears in the e34 dif to match the original rears

Unless you've seen someone do it, we don't think that will work either

euro 260g transmission case pn: 23111228301 to go on the front end of the stock transmission

BMW ran out, so you'll need to get one from a junkyard transmission in Europe.

am i missing anything? it seems like a few people have done this but have done quite a bit more than what is needed for just an m50 swap.

The few people who've done it have either built a franken pan using the stock iX pan to run the 24V engine at M20 angle or carved up the firewall in order to fit the E34 pan between the iX rack and the firewall.

or i suppose if you wanted to modify the e30 ix oil pan for the 10 degree change,

That would be ridiculously complicated fabrication.

[onlyindef]

question

Alright i have some questions on this for going with a 24v swap.

If I am able to get the euro 260g case i can use the stock driveline minus the e30 ix front dif. it will have the proper angle to clear the break booster. The oil pan will even be at the right angle for the half shaft, minus interfering with the steering rack.

The e34 front diff, is a different ratio then the rear so it would have to be swapped, but not a big deal. From my understanding they have the same spline count, and the e34 dif mounts in the same position so it would let me reuse the e30 ix half shafts.

This would maintain the stock brake booster location, angle for the half shafts, and retain most of the original drive line.

so the needed bits would be:
24v motor mounts like an e28 m5 mounts, or something like revshifts with e36 brackets (maybe e34?).
m50 engine.
e34 oil pan (to be notched to clear the steering rack)
e34 front diff
matching rear diff gearing or use a z3 gears in the e34 dif to match the original rears
euro 260g transmission case pn: 23111228301 to go on the front end of the stock transmission

am i missing anything? it seems like a few people have done this but have done quite a bit more than what is needed for just an m50 swap.

or i suppose if you wanted to modify the e30 ix oil pan for the 10 degree change, that would allow someone to keep the origional e30 ix front differential. it would have to clear the steering rack and have to allow for the changed angel of the half shaft. As long as the mounting compensated for the 10 degree change, and cleared the needed part, it would mount in the stock location. That would work as well..I think.

[Nisse Järnet]

Does it do anything but fully open and fully locked?
I want mine to be automatic based on differential driveshaft speed, and maybe lateral/longitudinal g's with a "launch" button that gives 100% lock until the vehicle exceeds whatever speed threshold I set.

No it doesn't, so you got to have a after market ECU or something too.

[The Dark Side of Will]

Thought i would share this:

X-drive controller:
https://www.youtube.com/watch?v=K7ma-0SNxKE

Its a Swedish guy, so if you have any questions i can ask.

Does it do anything but fully open and fully locked?
I want mine to be automatic based on differential driveshaft speed, and maybe lateral/longitudinal g's with a "launch" button that gives 100% lock until the vehicle exceeds whatever speed threshold I set.

[The Dark Side of Will]

Sweeeet! Thanks!

[Nisse Järnet]

Thought i would share this:

X-drive controller:
https://www.youtube.com/watch?v=K7ma-0SNxKE

Its a Swedish guy, so if you have any questions i can ask.

[The Dark Side of Will]

This looks cool:
http://www.pesch.cz/en/product/fiber...rs-for-bmw-e30



Looks like an option for square wheel/tire fitment on an iX with max effort rear wheels/tires.

[The Dark Side of Will]

I'll just have to count teeth when I get both.

I would like to put the DZ sixth into a BZ box, if you know anyone who has some gears hanging around.

[Nisse Järnet]

A5S 300J (old designation)
A Transmission type. S = Manual transmission. A = Automatic transmission
5 Number of forward gears
S Type of top gear. D = Direct gear. S = Overdrive gear
300 Max. input torque (Nm)
J Code letter of transmission manufacturer. G = Getrag. J = Jatco. R = GMPT (General Motors Powertrain). Z = ZF (Zahnradfabrik Friedrichshafen)
SMG SMG = Sequential M gearbox/transmission

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)

BMW designation.---- Manufacturer-----Manufacturer designation-------Remark
----S5D 200G-------------Getrag------------B transmission (220/5)
----S5D 200G-------------Getrag------------B transmission (221/5)-------for M41 engine only
----S5D 250G-------------Getrag------------B transmission (220/5)-------Reinforced design
----S5D 260Z-------------ZF-----------------C-transmission (S5-31 D)----for M51 engine only
----S5D 280Z-------------ZF-----------------C-transmission (S5-31)
----S5D 310Z-------------ZF-----------------C-transmission (S5-31)-------up to 9.95
----S5D 320Z-------------ZF-----------------C-transmission (S5-31)-------from 9.95 (reinforced design)
----GS5S31BZ(SMG)-----ZF-----------------C transmission SMG
----GS5-39DZ-------------ZF-----------------F transmission
----S6S 420G-------------Getrag------------D-transmission (226/6)
----S6S 420G(SMG)------Getrag------------D transmission SMG
----S6S 560G-------------Getrag------------E-transmission (286/6)
----GS6-37BZ-------------ZF-----------------H-transmission
----GS6S37BZ(SMG)-----ZF-----------------H-transmission
----GS6-37DZ-------------ZF-----------------H-transmission
----GS6-37BG-------------Getrag------------H-transmission
----GS6-53BZ-------------ZF-----------------G-transmission
----GS6-53DZ-------------ZF-----------------G-transmission
----GS6-17BG-------------Getrag------------I-transmission

Automatic transmission:
BMW designation.----Manufacturer----Manufacturer designation-------------Remark
----A4S 200R-------------GMPT-------------------GM4
----A4S 270R-------------GMPT-------------------THM-R1w-------------Transmission wide-stepped
----A4S 310R-------------GMPT-------------------THM-R1
----A5S 300J--------------Jatco-------------------Jatco
----A5S 310Z--------------ZF----------------------5HP-18
----A5S 325Z--------------ZF----------------------5HP-19
----A5S 440Z--------------ZF----------------------5HP-24
----A5S 560Z--------------ZF----------------------5HP-30
----A5S 360R/390R-------GM---------------------GM5
----GA6HP19Z-------------ZF----------------------6HP19
----GA6HP26Z-------------ZF----------------------6HP26
----GA6HP32Z-------------ZF----------------------6HP32
----GS7S47BG-------------Getrag-----------------SMG-------------------Motorsport M5
http://www.kneb.net/bmw/E36-7/BMW%20...signations.pdf


http://www.kneb.net/bmw

[Nisse Järnet]

Heres a 325D
https://www.bildelsbasen.se/?link=it...st_id=29520816

[Nisse Järnet]

Yes it does, heres from a 135i for example :)
https://www.bildelsbasen.se/?link=it...st_id=32774194

Hmm i dont think ive read about it in english forums, but in swedish :) People normally use DZ versions in M20 configs here because it fits the engine angle. Pretty common that they use DZ on M50s too though, mostly because of better price and theres is more of them. But BZ version is getting more used because of the better gearing as i mentioned and that the angle is like the M50 etc.
Specially the first gear is short on the DZ and most people here doesnt really like that :P

Oh and there are more than one bellhousing at least on the GS6-53DZ, some are too big and doesnt fit M20/M50 etc. It has to do with the codes after the gearbox model, like HGA, THGZ etc.

[The Dark Side of Will]

It has to be, really :)

We'll see when I grab one and crack it open ;D

All DZ gearboxes i have checked has got the 20 degree angle and diesel ratios, the E46/E39 x30d GS6-53DZ/GS5-39DZ and E9x 320d-330d GS6-37DZ/53DZ gearboxes for example is commonly used on turbo builds over here.

That is exactly what I'd expect to see based on the RealOEM info.

The E9x 335i GS6-53BZ is getting more common because of 30 degree angle and better gearing ratios.

Do the tags actually say BZ? Is there an English thread anywhere in which someone grabs a 335i box and counts input/output turns to estimate ratios?