1997 and later 4l60 to NP203 Kit
What you need to adapt a 4l60e to a NP203
Adapting a 4l60 to a NP203 is using a 6 to 4 bolt adapter.
Then bolting up with a TH350/NP203 adapter.
A 27 spline input needs to be installed into the NP203 if it doesn’t have one already.
If you already have one of the items on this list and do not need to order just put a (0) in the quantity.