need help with segment swap on 0411 ecm

Hello, I have been diging for a while to find out how to do a segment swap on a transmission or the engine calibration and have not found a "step by step" post to do this yet.

Here is my dilema...
I have a 454 and 4l80e I am running with the 0411 ecm. the current OS I am using is 01270003 and the trans calibration is 9358280> this 80e tans calibration will not work in 4wd low as the shift tables are no being changed properly for 4low shifting.

(from what I gather)I think I can use a 5.7L express van tune with OS 12212156 and a 6.0L 4x4 truck/4L80e tune OS(12212156) and swap the trans segments and then take that file and copy all the tables from my 454 tune to make this new tune/file run properly......
BUT
I need help on how exactly to swap the segments
Any advice would be greatly appreciated
Robby

Hi Robby,

To copy a transmission copy:
1. open the target .tun file,
2. open the donor file as the alternate file (must have same OS id),
3. go Edit->Copy Entire Segment->Transmission,
4. answer Yes to prompt,
5. answer Ok to acknowledge that it has been done,
6. save the target file.

Do not flash the file until you have saved it.

I "think" he's asking how to swap from different OS's. OS 12212156 to custom OS 01270003.

I've wondered the same thing.

Lee

Thanks guys,
Yes Lee I was hoping to be able to swap the trans segment from the OS 12212156 to custom OS 01270003, but from what I have read it needs the same number OS correct?
I just figured I would start over from the ground up with a new tune and copy tables, ect from my custom os tune and hopefully have my 4low working correctly.

I may try to see if the segment will copy to the custom OS just for the hell of it. If it works it will save me a ton of work

Thanks again,
Robby

Yes, same OS id number... you can do a segment swap between a COS and the GM OS that the COS is based on... see chart (from COS Upgrade Tutorial).

Can you run 12212156/02020003...? You might have to copy your tables over.

Quote:

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Originally Posted by joecar

Can you run 12212156/02020003...? You might have to copy your tables over.

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If you could do that, then start with clean files, do the seg swap, convert to COS, then repopulate the tables with your current tune. Will be a little work, but the results should be well worth it.