Toyota Motor Corporation's P family is a family of light/medium-duty transmissions found in Toyota cars. They use Porsche-type synchronizers. P51 Ratios: First Gear: 3.525:1 Second Gear: 2.054:1 Third Gear: 1.396:1 Fourth Gear: 1.00:1 Fifth Gear: 0.859:1 Applications: 1973-1981 Celica with 18R-G engine 1974-1981 Carina with 18R-G engine 1974-1981 Corona with 18R-G engine 1974-1981 Mark II / Cressida with 18R-G engine See also List of Toyota transmissions Toyota W transmission Toyota T transmission References External links Toyota Transmissions Toyota Engines and Gearboxes P Year of introduction missing