In 1962, Chrysler introduced a starter incorporating a geartrain between the motor and the drive shaft . The motor shaft included integrally cut gear teeth forming a pinion that meshes with a larger adjacent driven gear to provide a gear reduction ratio of 3.75 : 1.
42.
For every 3.23 revolutions of the smallest gear, the largest gear turns one revolution, or for every one revolution of the smallest gear, the largest gear turns 0.31 ( 1 / 3.23 ) revolution, a total reduction of about 1 : 3.23 ( Gear Reduction Ratio ( GRR ) = 1 / Gear Ratio ( GR ) ).
