Toyota Motor Corporation's W family is a family of RWD/4WD transmissions built by Aisin. Physically, these transmissions have much in common (like the bell housing-to-body bolt pattern) with other Aisin-built transmissions, like the Jeep AX-5 and the Toyota G-series. The W55, W56, W57, W58, and W59 are externally and internally very similar aside from the gear ratios. W40 4-speed transmission offered in base model vehicles in the 1970s. Often referred to as a Celica or Corona steel case 4-speed. The housing is steel as opposed to aluminium in later W series boxes. Ratios: First Gear: 3.287:1 Second Gear: 2.043:1 Third Gear: 1.394:1 Fourth Gear: 1.00:1 Reverse: -4.091:1 Applications (calendar years): 1971–1976 Toyota Celica (A20) 1970s Toyota Corona up to the *T132 chassis W42 4-speed transmission. Ratios: First Gear: 3.579:1 Second Gear: 2.081:1 Third Gear: 1.397:1 Fourth Gear: 1.000:1 Reverse: 4.399:1 Applications (calendar years): 1980s Toyota Hilux (aka Pickup) Toyota Crown RS60 W45 The W45 is a 4-speed variant of the W55 alloy case box. It replaced the steel case W40 around Oct 1980. It also came as a stock transmission in some of the 1981 base model Toyota RWD pickups. The W45 case was made of aluminium alloy. Ratios: First Gear: 3.566:1 Second Gear: 2.056:1 Third Gear: 1.384:1 Fourth Gear: 1.00:1 Reverse: -4.091:1 Applications (calendar years): 1980~ RWD Toyota Cars 1981 Toyota Hilux (2WD only) 1980–1982 TX60 13T-U Chaser (Japan) 1980–1982 TX76 13T-U Cressida wagon (Japan) 1980–1982 TX50 13T-U Cresta (jdm) W50 Often called the "steel-case" transmission for its steel shell, in contrast to the later W-series transmissions' aluminium case. This transmission is mostly associated with early Celicas of the 1970s. It is also shorter from the bellhousing face to the transmission mount than the later aluminium case W-series transmissions, despite using the same mount. Ratios: First Gear: 3.287:1 Second Gear: 2.043:1 Third Gear: 1.394:1 Fourth Gear: 1.00:1 Fifth Gear: 0.853:1 Reverse: -4.039:1 Applications (calendar years): 1973–1981 Toyota Celica 1974–1981 Toyota Carina 1973–1981 Toyota Corona 1979–1981 Toyota Supra 1976–1982 Toyota Hilux (RWD only) 1979-1984 Toyota Crown W51 Came in early 1980s CE71 Corolla wagon. Similar ratios as W52 except 5th Composition is alloy. Ratios: 1st gear 3.625 2nd gear 2.043 3rd gear 1.394 4th gear 1.000 5th gear 0.802 rev gear 4.039 Applications (calendar years): Toyota Corolla CE71/CE72 wagon behind 1839 cc 1C diesel engine (Japan). W52 Used in Australian delivered 2WD SR5 Extra-Cab Hilux (YN57) Composition is steel. Ratios: