T43 TCM Finding gear ratios in .bin

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GSRegal99
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Joined: Fri Nov 20, 2020 3:27 am
cars: 1998 GMC Sonoma, 3.6 VVT LY7 / 6L50
-E67 ECU / T43 TCU.
Location: Wisconsin

Re: T43 TCM Finding gear ratios in .bin

Post by GSRegal99 »

Hobo wrote: Mon Nov 18, 2024 11:57 pm I had some spare time and found the address in my os for the transmission model. I noticed in ghidra that nothing seems to be referencing it? Or am I looking at it wrong? I will have to give it a try anyway.

Does anyone know if the e67 has options for vss sensor location? As in after gearbox, after transfer, after final chain etc? I noticed the later e92 ecms have this and also the t42 tcms. I have looked but haven't found anything yet

I also read on a txt somebody posted in another thread that there is a front wheel drive option switch

Edit - I flashed in the file with the modified transmission model but no changes unfortunately. Seems like it's just an info/identifier thing?
I forgot about the FWD/RWD switch! Sorry! I checked my older notes, and that one is 4 bits to the right of the transmission model. 0x1C121D on my file above.
FWD = 01
RWD = 00 or 02 (I do not know what the difference is between 00 and 02. Maybe this is the VSS location you were looking for?

I also have a note for the auto/manual flag. Of that whole area I have the following noted:
01 00 00 00 00 82 00 80 00 02

Auto/Manual 00= Manual, 01 = Auto
Transmission Model The list is on this forum, I forget thread name
Drive train Type Above
-Sean
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Knackersjewels
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Re: T43 TCM Finding gear ratios in .bin

Post by Knackersjewels »

HP tuners actually lists the driven wheels switch in system tab.
RWD, FWD, 4WD
It then has the option for early or late CAN. Not sure if it works yet.

It also lists pulse changes for VSS
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Knackersjewels
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Re: T43 TCM Finding gear ratios in .bin

Post by Knackersjewels »

I haven't had a chance to test yet, but I'm fairly certain the switch to enable Engine Oil temp sensor on x2-65 on OS 6281 is at 1FEC62.
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