Will a 4l60e bolt up to a 2008 (LY6) engine? The engine is currently in a 2500HD 4x4 and I believe it has a 6 speed behind it.

 

Why would you want to down grade?

 

For what it's worth guys with vet's are removing the 6 speed auto's and installing 80's or 60's. I think the 6l80e has it's share of issues so this might be the reason the op has asked this question. We do have a 6l80e at the shop. IIRC the bell looks very similar to the 4l60e one. I would think that yes it should bolt up however the flexplate might be different. Maybe someone else can confirm this for you. Vince

 

I would think that you'd be better off with a 4L80E than the 4L60E, since it's going into a HD2500. I've been having difficulty getting a 60E to survive in my +14 second 1500 series truck.

 

Thanks for all of the advice guys and I should have been more detailed as to what I'm doing. I want to install the 6.0 into a '56 Bel Air (doing a retro-rod) and I did find out two things... The 4l60e won't stand up to the torque of the 6.0 motor and it will take way to much fab work to put the 6 speed into the car. The car is going to be an everyday driver (never see a car show) and I want to keep it very basic.
My question now is this. If I'm able to install a 4l80e to the engine will I be creating a computer nightmare?

 

There are stand alone controllers for the trans so I do not see that being an issue if you are skilled in this kind of thing. Depending on what you have to control the engine at this point you might have what you need to control the trans as well. It might be as simple as wiring it up and reflashing the computer for which trans you install. Vince

 

Thanks again Vince for your input and I'm going back to the original game plan of using a 320 hp 5.3 liter engine with a 4l60e trans. (more than enough to push my Bel Air down the road) and I personally don't know that much about computers plus I just want to keep the car simple and easy to work on when the time comes to have repairs performed. Basicly what we're doing is building a 50 states smog legal street rod so if the time ever comes when the powers in charge say we can no longer operate our old cars because their gross polluters well... I think you get the picture, it will meet all of todays emissions standards. I don't where you live but out here in California the government is pushing very hard to get all of the non-compliant cars off of the road for good. Allen

 

I would think if you are going to the the transmission and the engine out of a car or truck you could just do the wiring harness and be good to go. Just make sure that you have all of the connectors, like the MAS, O2 and all of the others.

You can get a good used harness off of this site for around $100-$200 bucks.

Sounds like a interesting build, could you fill us in on what you are building?

 

For what its worth - I think the california rules state that if the engine is going into a car, it has to come from a car, cant be a truck engine

 

Hey Stevenc... I went to "Ca.gov" and did some research. If you go to the site type in "engine change guidelines" then click on the first link and read the headiings Certification Standards, Classification, and Computer Controls. Then let me know what you think. Allen