Joined: Nov 2016
HoYa, the early (64-66) C4 transmission had an oddball valvebody with 'ranges'. I.E., the ol' Green Dot setup. However, it's very common to find one that has the later '67+ valvebody, with PRND21. Perhaps you've got a 'newer' transmission or valvebody in your car?
Edit: The "Dual Range" Cruise-O-Matic (64-66) C4 starts in 2nd and shifts to 3rd when it's in "little Dot", goes 1-2-3 in Green Dot, and stays in 1 when you put it in the lowest slot. The detents are all the same for a later C4, even though the markings are different, but you get all 3 gears automatically in D, and it will simply hold 2nd or 1st when you select those positions.
I smile a lot. It makes people wonder what I'm up to...