Okay, the VT-20-E and the VT-25-E are basically the same CVT transmission.
The AF23-5 is a 5 speed automatic that was used in the Saturn's.
It is not a bolt in item. You need to change out a bunch of stuff to make it work.
AF23-5 trans and converter from an 03 or 04 Ion sedan (newer will not work)
AF23-5 Transmission computer and engine/trans wiring harness (remove at fuse junction)
AF23-5 Cooler lines
AF23-5 front, rear and drivers side mounts
AF23-5 shifter cable bracket
It is a swap that has been done many times. Google VTi to AF23 transmission swap for more information.
Thursday, January 19th, 2017 AT 1:32 PM