If using the OEM computer gets problematic, here's another possibility:

www.ampefi.com/product/ampefi-transmission-controller-with-4l80e-subharness/

I don't have any hands-on experience with this product, but I'm considering using a 4L60E trans and a small block V8 on an upcoming upgrade to a mid-1990s S-10 pickup that's currently running a 4.3L V6 and a 700R4 trans. The same company makes a trans controller for that application.


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