On your 67 and later c4's they're Select shifts,1 is low,2 goes from 1st to 2nd and stays there and D goes 1-2-3. On 66's and earlier they're called Cruise-o-Matics.1 is low,2nd position(green dot) is 1-2-3 and small dot (below N) goes 2-3.So in a way it's totally reversed.. sort of.. I think the idea of that was it was more easier for snow driving back in those days.These days it's more better for hi horsepower applications ie better traction if you just go 2-3.