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Any DCT owners changed their final drive / diff ratio?

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  • Tomba
    replied
    Originally posted by olza View Post

    Internal Flash
    Memory configuration
    Sector Address Size Type
    01 0xA0000000 0x00004000 RW
    02 0xA0004000 0x00004000 RW
    03 0xA0008000 0x00004000 RW
    04 0xA000C000 0x00004000 RW
    05 0xA0010000 0x00004000 RW
    06 0xA0014000 0x00004000 RW
    07 0xA0018000 0x00004000 RW
    08 0xA001C000 0x00004000 RW
    09 0xA0020000 0x00020000 RW
    10 0xA0040000 0x00040000 RW
    11 0xA0080000 0x00080000 RW
    12 0xA0100000 0x00078000 RW

    can you try to rewrite any of first 8 sectors? if so, i can give you patched data with signature check bypass.
    I don't have a car by hand currently. But can do this once I am working again.
    I can change the final drive ratio and read out the memory again after flashing. I suspect they (magicmotorsport) bypass RSA themself. At least as far as I know they do this on Fxx DMEs as well. First flash takes 5-8 minutes. One after that mostly 2 or less minutes. I haven't flashed any DCT yet.

    Leave a comment:


  • olza
    replied
    Originally posted by Tomba View Post
    xHP currently supports some DCT transmission and adds the possibility to change the final drive ratio.
    Unfortunately I don't have an A2L file for the DCT transmission. I can read it with X17/Flex tool (MagicMotorsport). But don't know the location/value to edit.

    In attachment DKG/DCT read from E9X M3.
    Internal Flash
    Memory configuration
    Sector Address Size Type
    01 0xA0000000 0x00004000 RW
    02 0xA0004000 0x00004000 RW
    03 0xA0008000 0x00004000 RW
    04 0xA000C000 0x00004000 RW
    05 0xA0010000 0x00004000 RW
    06 0xA0014000 0x00004000 RW
    07 0xA0018000 0x00004000 RW
    08 0xA001C000 0x00004000 RW
    09 0xA0020000 0x00020000 RW
    10 0xA0040000 0x00040000 RW
    11 0xA0080000 0x00080000 RW
    12 0xA0100000 0x00078000 RW

    can you try to rewrite any of first 8 sectors? if so, i can give you patched data with signature check bypass.

    Leave a comment:


  • olza
    replied
    this is GTS HW-NR 7844978 ZB-NR 7845773 - SW-NR 7845781
    Last edited by olza; 09-07-2020, 04:28 AM.

    Leave a comment:


  • Tomba
    replied
    Originally posted by olza View Post

    OMG thank you for external eeprom dump and PFlash sectors 0-7 dumps!!! This is i need so much!!!

    Final Drive Ratio is at 0x271FC (Sector 8) offset in your int_flash dump. Value is (4E 0C) = 0xC4E = 3150 (3.15x1000).
    No problem. Glad I could be off assistance. Thanks for pointing out the final drive ratio, helps a lot!

    Originally posted by Martyn View Post
    Nice find.

    Tomba, does the X17/Flex automatically correct checksums/rsa?
    Yes, it does. As far as I know currently only MAPS are able to be changed.
    You can also clone gearbox control units with the software

    Originally posted by tdott View Post

    Was this a read from a GTS flashed DCT?

    Or normal Euro or NA?

    I'll have to check, I believe normal European one.
    You can compare 0da files from SP daten and compare "regular" file vs "GTS" file. I still think without A2L file it will be hard.

    Leave a comment:


  • tdott
    replied
    Originally posted by Tomba View Post
    xHP currently supports some DCT transmission and adds the possibility to change the final drive ratio.
    Unfortunately I don't have an A2L file for the DCT transmission. I can read it with X17/Flex tool (MagicMotorsport). But don't know the location/value to edit.

    In attachment DKG/DCT read from E9X M3.
    Was this a read from a GTS flashed DCT?

    Or normal Euro or NA?

    Leave a comment:


  • olza
    replied
    seems i hacked signature check today, thanks to this dump binarys!

    Leave a comment:


  • S54B32
    replied
    If someone knows how to correct checksum, we can maybe repack 0PA/0DA files to flash with Winkfp. I have access to a DCT swap (with different rear ratio) to test.

    Leave a comment:


  • Martyn
    replied
    Nice find.

    Tomba, does the X17/Flex automatically correct checksums/rsa?

    Leave a comment:


  • olza
    replied
    Originally posted by Tomba View Post
    xHP currently supports some DCT transmission and adds the possibility to change the final drive ratio.
    Unfortunately I don't have an A2L file for the DCT transmission. I can read it with X17/Flex tool (MagicMotorsport). But don't know the location/value to edit.

    In attachment DKG/DCT read from E9X M3.
    OMG thank you for external eeprom dump and PFlash sectors 0-7 dumps!!! This is i need so much!!!

    Final Drive Ratio is at 0x271FE (Sector 9) offset in your int_flash dump. Value is (4E 0C) = 0xC4E = 3150 (3.15x1000).
    Last edited by olza; 10-08-2020, 09:25 AM.

    Leave a comment:


  • Tomba
    replied
    xHP currently supports some DCT transmission and adds the possibility to change the final drive ratio.
    Unfortunately I don't have an A2L file for the DCT transmission. I can read it with X17/Flex tool (MagicMotorsport). But don't know the location/value to edit.

    In attachment DKG/DCT read from E9X M3.
    Attached Files
    Last edited by Tomba; 07-20-2020, 10:54 AM.

    Leave a comment:


  • Peter De La Mare
    replied
    I went 3.62 a couple of years ago. The downshift blips disappeared as expected. TRS Performance in the UK tweaked the map to reflect the ratio change. Now back to normal.

    Leave a comment:


  • tdott
    replied
    I believe changes are in the DCT module also, GTS software on a regular M3 is a popular mod. One of the first guys that claimed to have been able to change the ratios says he starts with the GTS software and makes his changes.

    Leave a comment:


  • terra
    replied
    Originally posted by Martyn View Post
    Yeah, i've seen similar too. I wonder why in the MSS60 both manual, SMG and DCT ratios are defined and in the MSS65 manual and SMG ratios are defined if they aren't used....
    Could be for other functions like cruise control or shift lights. Though idk why the SMG ratios would be there.

    Leave a comment:


  • Martyn
    replied
    Yeah, i've seen similar too. I wonder why in the MSS60 manual, SMG and DCT ratios are defined and in the MSS65 manual and SMG ratios are defined if they aren't used....
    Last edited by Martyn; 04-21-2020, 11:47 PM.

    Leave a comment:


  • terra
    replied
    Originally posted by Martyn View Post
    I believe I have located the final drive ratio in the MSS60 so I need someone with swapped gears to try it. I did have someone who had fitted a 3.62 in their E92 but he has other issues at the moment.
    From what I'm seeing, there needs to be something edited within the transmission software itself (in fact 335 guys sometimes will flash M3 DCT software so that they can run the M3 ratio).

    Leave a comment:

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