Code:
AM Shifter AM-0957
Drive PN Driven PN Drive NT Driven NT SET RATIO O'ALL RATIO
AM-0018 AM-0024 12 40 3.33
AM-0451 AM-0022 15 48 3.20 10.67
AM-0139 AM-0140 35 28 0.80 2.67
AM Shifter AM-0001
Drive PN Driven PN Drive NT Driven NT SET RATIO O'ALL RATIO
AM-0018 AM-0024 12 40 3.33
AM-0451 AM-0022 15 48 3.20 10.67
AM-0025 AM-0023 28 35 1.25 4.17
Also,
here is a render of AM-0001 with the gear teeth shown.