hawkls7

Hi guys my problem is , i have a gto , which had the 6lt ls2 engine the ecm =E40 ecm . the trans comp = t42 tcm which runs the 4l65e transmission.We have installed the 4l80e trans and now we need the operating system to run this trans . is there any trucks that have the ls2 comp running with the 4l80e your help is essential

kbracing96

iTrader: (25)

What software are you using for tuning? If EFILive, you need to find a tune with the same os number from some place like holdencrazy.com and just do a trans segment swap with a tune that has a 4l80. If you have HPTunners, you have to email them your tune for them to do the segment swap for you.

foff667

iTrader: (2)

There are no TCM segments on E40 pcm's, they use a separate TCM.

kbracing96

iTrader: (25)

Forgot about that

hawkls7

I have researched and have decided to use an external tcm . which would be the best for my system , i read about PCS and tci and compushift . Which one would best suite my application Please help , any costings also thanks.

wait4me

iTrader: (10)

there are t42 ecms controlling a 4l80e trans. I would just use the stock one if you are using an e40 ecm.

GNXClone

iTrader: (7)

Which vehicles have T42 and 4L80E? I would like to know so I can investigate this further. Thanks.

slow

iTrader: (7)

2007+ 2500 HD pickups should have 4l80's and T42's

Ryan

GNXClone

iTrader: (7)

Thanks slow. Unfortunately, all I have found for 2007+ are 6L90E and Allison transmissions.

GNXClone

iTrader: (7)

Yay! Found one from an '07 Yukon. Thanks for the info guys!
-------------------------------
1 24235341 Operating system
2 24233118 System
3 24238958 Transmission
4 24233116 Transmission diagnostic
-------------------------------
Selected Options:
VIN: 1GKGK26K47R153097
Controller: TCM Transmission Control Module

94camaroz28lt1

iTrader: (1)

Did you ever get this working how did you do it?

edcmat-l1

iTrader: (10)

PM Alvin@Tick on here. He has a conversion harness to run a 4L80 with a T42 TCM.

94camaroz28lt1

iTrader: (1)

What about tuning? Or do you just need the harness adapter? Is there anything special about the adapter? Couldn't I just wire the pin-outs from the TCM to the 4L80E plug?

edcmat-l1

iTrader: (10)

No if it was that simple, that's what everyone would do.

Yes there is some tuning involved.