5hp18 -> 5hp30

[Frank87]

Awesome info there, thank you for sharing your deliberations. Agreed, 5HP24 will need at least a later type EGS module.

And certainly your project will need an 5HP30 in the long run. It will be interesting to hear your thoughts once you progress, as 5HP30 comes from many later cars, so it is possibly you will get one from an E38/E39 and be able to make some checks? Or even
an X5 (if that one really fits), it seems 5HP30 from all these can work with e34 and e39 EGS. Though this needs to be checked physically.

My suspicion is that the e34 (ADS interface, non CANBUS) ABS, EGS and ECM collect the required drivetrain data, eg wheel and throttle speed information as this is used to implement ATSC (on a 540 and other ATSC
cars), but not throttle (E34 built with ATSC+T may implement it by closing the injector valve timing), perhaps M5 with fly by wire does. My hope is that the information these collect is enough for late GS 9.20/9.22 equipped ECU to work the steptronic features as per e39 540i.

If so, to retrofit ZF's 5AS steptronic transmissions, it may only be necessary to implement an e39 fly by wire throttle setup and/or CAN throttle position sensor, and of course it would at least require CANBUS twisted pair between the 9.22 EGS, e39 throttle sensor, kickdown switch. I do not think this is hard to do. The ABS sensor is at one end of the CANBUS and is used to terminate one end of the network. Without an e39 ABS sensor, it will just require fitting a 120 ohm resistor between the yellow/black and yellow/brown Twisted Pair. It may be worth studying the OBDII E31 840ci ETM/TIS for more clues- or alone early 1995 E38 and <10/1996 E39. I do not know which module contains the termination resistor for the other end, it is likely to be in the EGS, ECM or the cluster. My guess is the cluster, so to setup a CANBUS between an ad-hoc bunch of e31/8/9 modules could take two resistors, one at each end. I totally agree, the greatest candidate for a 5AS auto transmission upgrade is the 535i/735i, as once M30B35 is done, B34, B33, B32,B28, as well as B20
powered cars, all would be in scope for anyone to do. I think however that later ECU may be a requirement to implement an early steptronic EGS, so M50/M52 powered e34s would be the ones to do after M60.

It would however be truly great to open up 5HP24 upgrades as a DIY mod for any 6 cylinder E34, E32, E31, E30 E28, E24, E21, E12, E9, E3- that's a lot of BMWs that need new gearboxes that are freed up from all those 'naughties era' models going to a premature death right now.  Standard/manual transmissions are not always the right option for people with older cars experiencing automatic trans issues, after all.

Re EWS and DWA, I am not aware of the EGS being involved in the key exchange from the transponder controller, but it may operate the gear knob lock solenoid on the shifter. On E39 this solenoid has a two pin connector (simple 12V control) which does not
appear to connect to CAN module in the shifter switch. I just looked at an early e39 shiftronic shifter assembly I have here - it uses the physical selector cable to select gears on the transmission directly, and uses two microswitches to implement the up/down side. Both, along with the main swiper switch talk to the EGS via a6 pin connector.

Not sure if this helps shed any light for you, but the closer I look, the more it appears possible!

The X5 was never delivered with a 5HP30. Only the 4.0 V8 and 5.4 V12. Some say there are a few 3.5 and 4.4 V8 with 5HP30 RIGHT before 5HP24 became available.

ASC on the E34 actuates a throttle valve that does not open airflow but closes it. It is in front of the actual throttle valve in the cornering piece.

If you would want steptronic on an E34, this would not nesscarily be a problem. Steptronic is simply some software coding in the gearbox that says:
"If position S is selected, signal on PIN x means upshift, signal on PIN Y means downshift." And all other regular "S" mode software planning is in effect.

So if I wanted steptronic, i'd take a steptronic 5HP30 EPROM and a standard 5HP30 EPROM. Then compare (assuming I can get proper code from it with somekind of software) the software programming. If you can discover the exact steptronic part, you may be able to transplant the coding to your old 5HP30 EGS. You then hook up a 12v signal yourself to the pins that the code uses.

You are for some reason fascinated by the 5HP24 . To get this more modern box to work, you will need the 88 pin setup and you will need to reprogram a 5HP18 / 5HP30 EGS/AGS. Basically, the 5HP18/5HP30 EGS AGS can already communicate with all other modules and get all required signals legitimately. That part, the "reading" part where the EGS/AGS reads off data, you keep that intact. Then you have the actual actuation / shift part of the programming. You literally replace the 5HP18/5HP30 SHIFT programming with 5HP24 programming. This is in theory the way to go. So if a 5HP18 would actuate solenoids 1 and 2 to shift from 2nd to 3 and the 5HP24 would actuale its 4th 5th and 6th solenoid, you would literally modify the programming that way including the proper wiring actuation because the loom from EGS to 5HP24 differs from 5HP18 and 5HP30. Mechanically a 5HP24 will fit any M60/M62 and probably also M70/M73. It is pure a programming and actuation issue.

If there was someone who knows what software can be used with an EPROM reader to see the coding of the EGS/AGS in normal script language instead of "!@#$DHI@#HRE@!", I would get into it immediately.

btw, Getting a 5HP24 to fit would need a custom bellhousing or a 4HP22 / 4HP24 bellhousing needs to be modified to fit the 5HP24 box. Then HOPEFULLY, the 5HP24 converter will fit with the right clearances. This way, M20 and M30 engines could take a 5HP24. Both the 4HP and the 5HP24 boxes have detachable bells.

[genphreak]

Hmmm. More good grease for the mill...

Oh yes, that flappy valve in the bend... that is what it is for- stopping us vapourising our rear brake shoes with the engine, every time we turn a corner and hit the gas!

Yes, perhaps I am fascinated by 5HP24 as a possibility the older cars. No-one has done it yet, and this update would brings a lot of benefits to older 6 cylinder models without extra weight:
- Changes the feel of a car massively. And you are right, it is not steptronic that makes the difference, but the program and change speed is radically improved. Driving an auto M54/M56 is totally different to the previous 'clutched' boxes. They are far more perceptive, so downshift better, change quicker and the torque converter lockup is in better.
- Of course it is nice to be able to use steptronic, esp. through corners, and have a more up to date gear lever
- Amazing economy improvement over any car with a 4AS unit if the bellhousings can be adapted as you are thinking

If the shift programming in an 5HP18/30 EGS can be re-coded with the data from the 5HP24 EGS, and there are no additionally required data inputs necessary, it would mean no CANBUS or other retrofitting, and in that case, woot! Job done! But if this is so, how come no-one has done it yet?

To modify the EGS, the best thing is NCSExpert and NCSDummy. These will show and allow collection and disassembly of the code in the various modules and control units, not just the EGS. NCSExpert collects what are called 'trace files' from the target module, and allow you to append parameters within them, however NCSDummy can be used to make the changes in its UI by choosing from known valid parameters in drop-downs, making custom coding easier even if you are just wanting to turn options on and off (simple changes to the binary values 0 and 1), or manipulating hex dumps. Much easier than using generic tools to manipulate the data by hand of course. NCSExpert can be used to re-assemble (compile) these files and re-code a target module when you are done. SSS and DIS allows some re-coding but these are limited as they are designed for the dealer techs, not modders. They don't allow the options NCS expert was written to do. IIRC, ECU and EGS data programming maps and shift program data) can be done by modifying the (Hexdecimal) DATEN files.

https://www.bimmerforums.com/forum/s...-of-NCS-Expert

I will take a look and see what I can find out...