How do you do a segment swap?

[joecar]

1SH, did the 12212156 file work out (does your 'Hoe run...?)...?

[1SlowHoe]

It did! I drove it home today. I even did a little brake stalling and tire burning to ensure proper operation
EDIT: Actually I had to find the same OS. The 12212156 OS didnt work.

[joecar]

Cool... good job.


More info:
1787-gm-os-to-custom-os
13658-Why-does-1st-gear-slam-into-2nd-4L80E-translplant

[joecar]

What steps did you do...?

(edit: note to self: he started with 4L60E 12216125).

[1SlowHoe]

I took the tune from a 8.1L/4L80E, same OS as mine. 12216125
I opened it and my dyno tune, then just followed the steps in the segment copy directions. I copied the trans calibration and trans diagnostic segments into my dyno tune and loaded it in the PCM. I started up and ran great first try. It works wonders when you can find the same OS to copy from.
Thanks for helping me out

[Superado]

what if you have OS 09381344?
this is the only missing link in my 4L80e conversion...

thanks!

[dc_justin]

what if you have OS 09381344?
this is the only missing link in my 4L80e conversion...

thanks!

For your truck, I'd suggest bumping up to an 01 or 02 OS before doing a segment swap. 12212156 for example. Could then run a COS as well.

Justin

[Superado]

got the 4L80e segments for my OS...
was very easy to swap segments and seems to work fine...

[joecar]

If it's ok with you, can I eyeball your file... ...thanks.

[Superado]

here ya' go...

please look at it for the issue I posted in a couple other threads as well...

thanks!

ANY suggestions are greatly appreciated!
very new to tuning...