Hi , I have a flashscan v2 and am having comms issues with a faulty t42 tcm . Is it possible to extracts the op system and transfer the data into a purchased second hand unit .
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Hi , I have a flashscan v2 and am having comms issues with a faulty t42 tcm . Is it possible to extracts the op system and transfer the data into a purchased second hand unit .
T42s are pretty robust, check all wiring and fuses for the transmission circuit. If you want to try a new T42, start with a known good file, change the VIN, and Full Flash a base file.
Thanks for the reply . I have linked an exchanged unit and now the module shows up present but the issue im having is still present which when acc is on i do see all gear selection on vehicle dash but when engine is running it justQuote:
Originally Posted by ScarabEpic22
stays at P even though i can shift and select all gears at shifter . then check trans fault occurs
Ok is this a factory vehicle using a factory-matched ECM + TCM calibration? If not, the first visual place you'll see issues is with the gear selector being incorrect.
If it's a swap, need to make sure the ECM+TCM OS' can talk to each other, GM went through a few variations of CAN comms with the Gen IV controllers.
The TCM has been linked with other modules and correct vin in new TCM has been installed the dealer checked the OS in new TCM and assures all is correct and up to date . He told me that it is an electrical faultQuote:
Originally Posted by ScarabEpic22
which may be the neutral start switch or the pressure switch manifold in the trans (4l80e) vehicle is a HSV GTO coupe VZ LS2 .
I don't know about the HSV VZ, but the GTO never came with the 4L80E in the US. You have to use a non-factory TCM OS to make it run a 4L80E OR change the wiring with an adapter harness. I doubt a dealership would put the correct 4L80E OS into the TCM as it isn't a factory combo, but we need to check.
Post the ECM and TCM tunes here along with a full specs of your car. I'm thinking you need to change the TCM OS to work with your 4L80E, if you try to run a 4L60/65/70E TCM OS on a 4L80/85E transmission it usually won't work and will definitely be in limp mode.
Also not sure what year we're talking, guessing 05 or 06. For 06, the TCM OS is 24235341 and the same as a 07 Suburban which came with the 4L80E.
sorry , my combo has been running good for about six years , it is an 05 model which we were running the t42 tcm with a PCS controller pigy backed of the original TCM to run the 4l80E . The original TCM is shot so i have no way of extracting infoQuote:
Originally Posted by ScarabEpic22
from it as when i module check it says not present so i have had the dealer re link another unit in which he has put the Os for that particular vin from vehicle .
Thank you, this information would have been helpful to know initially.Quote:
Originally Posted by Mr teabags
If you want to keep this setup, check with PCS as to what TCM OS works with their controller and use that. If you are unable to connect to the T42 with EFILive, my guess is there's a wiring issue and/or the PCS controller is causing issues.
Thank you all, very helpful information!
sorry for mis information . the codes i am getting are from engine on an then P will stay on dash until codes cleared .Attachment 23718Attachment 23719Attachment 23720Attachment 23721Attachment 23722Attachment 23723Quote:
Originally Posted by ScarabEpic22
Attachment 23723
this is what i could extract from damaged tc
i think i have managed to extract data from damaged t42 tcmQuote:
Originally Posted by Mr teabags
new tcm t42 data current if some one can compare the two would be great help
I figured it out with a little reading on this forum all is good i managed to full flash new tcm with my old tcm op system car seems to be running now with no codes , thanks for helpQuote:
Originally Posted by Mr teabags
Glad to hear you got it fixed.
Good job :cheers: