Need help with 4l60e
This is the new one
This is the old one
The "black box" performs the Starter interlock, tells the PCM whether you are in Park/Neutral and runs the backup lights.
Since it appears your can doesn't need it, you can ignore it or even remove it.
If the replacement trans has a longer shift shaft, you may need to improvise your shift cable or have a trans shop swap shafts for you.





