4l80e swap help

[joecar]

But was it for a 4L80E...?

( I have a link to one somewhere here )

[05chevy]

Yes 2002 6.0l with 4l80e

[Taz]

... purchased a conversion harness off of the internet. Came with the adapter and new pig tail and pins to install the second speed sensor ...

Was it intended for use with a 4L80 tune ? Or did it include a relay (intended for use with a 4L60 tune) ?

... I copied the transmission files from a 12212156 o.s. ...

Simply copying the parameters from a 4L80 tune into a 4L60 tune won't make the tune compatible with a 4L80 ... the solenoid logic and TCC function are different. This requires an actual 4L80 tune, or a transmission segment swap into your current tune.

[05chevy]

Was it intended for use with a 4L80 tune ? Or did it include a relay (intended for use with a 4L60 tune) ?



Simply copying the parameters from a 4L80 tune into a 4L60 tune won't make the tune compatible with a 4L80 ... the solenoid logic and TCC function are different. This requires an actual 4L80 tune, or a transmission segment swap into your current tune.

The harness came with only the adapter plug and new vss wire to pin into the pcm.

How do I do a segment swap. Upgrade the 5.3/4l60e O.S. with a 6.0/4l80e O.S.?

[05chevy]

I also have the pcm from the 02 truck that this trans came out of. Could I just switch the pcm and vin number in the truck?

[05chevy]

I'm to the point now. I will pay someone to do the segment swap for me because I have to get my brothers truck back up and running. His other truck broke also. So he has nothing to drive.

[joecar]

When you do the segment swap you also have to repin a few wires... you need to check how the harness is pinned.

[05chevy]

When you do the segment swap you also have to repin a few wires... you need to check how the harness is pinned.

Even with a conversion harness?

[Taz]

These are some of the difficulties that can be encountered when people fail to do sufficient research and planning prior to going ahead with conversion projects.

By your description, it would appear that the adapter harness you purchased was intended for use with a 4L80 calibration.

You attached your original tune in post #1 of this thread.

Attached below is this same tune, but with 4L80 segments inserted.

Hopefully this will get you (and your brother) going again.

[05chevy]

I tried everything that you all suggested and had no luck. I have not tried your tune Taz. I ended up swapping in a pcm out of a 6.0/4l80e truck. And it shifts perfect. I know I said the truck is a 99 but I'm wondering if it has a 98 pcm. What I have read was the 98s are not compatible with a 4l80e. And I would have had more time to research this project but the pump went out of his dodge so we tried to get his chevy back up and running.

Thanks for all the help

Taz I will put the other pcm out and see if your tune works. And report back. Once again thank you