4TH GEN LY6 and 3rd GEN 4l80

[FastCraig]

I am trying to decide the best direction to go with my harness and controllers. I knew months ago that intermingling older and newer parts would present compatibility problems. So I have a 4l80 Gen 3 transmission, an LY6 Gen 4 engine with a Gen 4 donor vehicle that has a 6l80. What is the best way to make the 24x and 58x work together? I spoke to a local LS1 guy who can make a Gen 3 harness for me and use the Lingenfelter conversion box. Is this the best solution for my application? Total cost for harness, Lingenfelter and basic tune is about $650. Are there better options? I'm not using VVT but want to keep DBW. Any suggestions appreciated.

 

[Turbolq4]

That's probably the easiest solution. Trans control seems to be more of an obstacle than engine control.

 

[Northernregal]

Check out the chevy van ecm software versions. They were usually a step behind the trucks with stuff. I'm betting you will find one with 4th gen engine control and a 4 speed trans, or at least one you can sector swap the trans control over and wire it in.

 

[Northernregal]

A quick Google search shows the 2007 Vans had this combo. Find a junkyard harness with E38 ecm. Easy fix.

 

[FastCraig]

Thanks guys. I told the guy to start on my harness and programming tomorrow.

 

[Texas82GP]

I guess I'm a little late with my reply, but check out my thread on the 4L80E swap in my 2008 Sierra. My truck has an E38 PCM and T42 TCM. My truck originally had a 4L60E. It was no problem for my tuner to segment swap in the transmission control program for an Express van. The swap only required minor modifications to my wiring harness to accommodate the 4L80E. This is the way I recommend you go. This way you run a 4th gen PCM with your 4th gen 58x engine which will support the DBW that you want.

Texas82GP's GMT900

A little less than two weeks ago the transmission went out on my daily driver. It's a 2008 GMC Sierra 1500, regular cab, short bed, two-wheel drive with a 5.3 and a 4L65E transmission. The 4L65E has been built twice in the last 50k miles. It has some nice goodies inside it but I keep finding...

gbodyforum.com

 

[FastCraig]

I guess I'm a little late with my reply, but check out my thread on the 4L80E swap in my 2008 Sierra. My truck has an E38 PCM and T42 TCM. My truck originally had a 4L60E. It was no problem for my tuner to segment swap in the transmission control program for an Express van. The swap only required minor modifications to my wiring harness to accommodate the 4L80E. This is the way I recommend you go. This way you run a 4th gen PCM with your 4th gen 58x engine which will support the DBW that you want.

Texas82GP's GMT900

A little less than two weeks ago the transmission went out on my daily driver. It's a 2008 GMC Sierra 1500, regular cab, short bed, two-wheel drive with a 5.3 and a 4L65E transmission. The 4L65E has been built twice in the last 50k miles. It has some nice goodies inside it but I keep finding...

gbodyforum.com

Thanks Texas82GP. I decided to go with a Gen 3 harness, ECM and the Lingenfelter converter. It isn't exactly how I wanted to go but seems like a simple, clean reliable solution.

 

[G.P.]

Man im even later to the mix.. but if you're poor like me. Cough##
the wiring needed is minimal-nothing typically.

Sloppy Mechanics Wiki - 4L80E Cheap stand alone trans controller using 0411 GM engine PCM

EDIT 9/26/16 - Now I have over 400 miles on this stand alone transmission controller. I also recently turned on the torque converter clutch to activate in overdrive. Everything is working perfectly and shifts just like it should. As the subject says. This is for those guys who are running

sites.google.com

or maybe i read the OP wrong this site is usually always helpful.

 

[G.P.]

this is cool too... sloppy af tho...