4L80E swap in NBS 2007 truck

[Mike@ADS]

Has anyone done this yet? I was just wondering. I have a 2007 here that the customer put a 4L80 in w/ his 4.8L 1500 2wd and I got it rewired, but I am having problems finding a 4L80 segment ID for this OS: 12614088. Is it even possible?

Thanks,
Mike

[Bill@HPTuners]

Its not a segment anylonger, gm uses an entirely separate TCM for the newer vehicles.

[Mike@ADS]

I realize that, but if I do a write entire with a 4L80E program, won't it recal the TCM? I am trying to find a 4L80 TCM out of a junkyard to swap out with the 4L60E one now in case I can't do a write entire with the segment ID's. I can even do it if I can find a VIN from a 2WD w/ a 4L80E in it. I have a Tech2 to manage that if necessary.

[Bill@HPTuners]

I am trying to find a 4L80 TCM out of a junkyard to swap out with the 4L60E one now

Thats currently your best bet, since we don't license the tcm you wouldn't need to use any more credits doing this.

[Mike@ADS]

Ok, got it going finally. It shifts just fine, but that 4l80 sucks alot of power out of a stock 4.8L. That was a pain in the azz.

[n77nxc]

Why did the customer do the swap? A 4L80E sounds like major overkill for a 4.8L.

[Mike@ADS]

No clue. He also has 38's and a 8"-10" (or so) lift to make it look 4wd when it is just a 2wd.

[n77nxc]

No clue. He also has 38's and a 8"-10" (or so) lift to make it look 4wd when it is just a 2wd.

LOL! I truly hope a motor swap is next. My 07 Sierra with a 4.8 is barely strong enough to turn my 33's.

Glad you got it worked out.

[EC_Tune]

As a side note:
IIRC a Tech2 will write the TCM separately from the ECM.

So, if you have access to a Tech2 you can put the proper cal in the T42 trans controller if you have the right VIN number.

[Mike@ADS]

That's exactly what I found out EC. I used a 2008 Express van 4L80E TCM code and programmed it in with the TechII.