My 4L60E is starting to show signs of a pending failure and I found a low mileage 4L70E for cheap. I couldn't find any information about the ability to swap it in place of a 4L60E. I know the only difference in the wire harness is the ISS but does this prevent it from being a direct bolt in?

 

Direct bolt in.

 

Awesome! I need a built 4l60E but at least this will buy me some time since it's my DD.

 

Agreed yes its a direct bolt in and electronics match fine .

 

looking at this same swap. all i have found is the tcm is in the tranny. all computer controls will still work fine?

 

The TCM isn't in the transmission, in the 6l80e the TCM is in the transmission. The 4l70 has the TCM next to the PCM.