4L80E Swap

[Brett68]

Has anyone swapped in a 4L80E and Transfer case into their K5?



Thanks
Brett

 

[Greg72]

For enough money anything can be fitted.

The toughest part of the 4L80e swap is the standalone controller and custom adapter for the xfercase.

If you're running a smallblock it might be more economical to do a 700R4 for the overdrive gear.

-G

 

[Brett68]

Thanks Greg. The 700R4 would probably be the most economical. Considering a donor vehicle is easy enough to come by in my area. Along with a TBI 350.


Brett

 

[Jimmy4matt]

We've got a 700R4 in our '72 3/4 ton 2wd work truck. We tow and haul frequently, but not abusively. We are on our 4th 700 and a couple of them were TCI's allegedly heavy duty ones. If you are going to swap in an OD you need to be honest with your driving desires/ needs. The cost may not make sense economically on a truck that's not driven a lot. And if it's to make driving nicer the electronic shifting ones are a lot nicer in my opinion. A 4l80e is on my dream list, but I'll keep my th350 until I can afford the 4l80 because of all the failed 700R4s we've had. A truck that goes through mud or up steep hills should have a beefy transmission because of the extra load in my opinion.