Geartrain

Geartrain








Power is transmitted from the torque converter to the planetary gearsets through the input shaft. Bands and clutches are used to hold and drive certain combinations of gearsets. This results in five forward ratios and one reverse ratio, which are transmitted to the output shaft.





Planetary Gearset-Front
The planetary gear front carrier is driven by the input shaft.
^ The front planetary gearset carrier drives the center shaft via the overdrive one-way clutch in 1st, 3rd and 4th gears.
^ In 2nd, the front sun gear is held causing the pinion gears to rotate around the front sun gear.
^ The pinion gears in turn drive the front ring gear and, with the intermediate band applied, results in a 2nd gear ratio of 1.87 to 1.
^ In 5th, the front sun gear is held causing the pinion gears to rotate around the front sun gear.
^ The pinion gears in turn drive the front ring gear and, with the intermediate band applied, results in a 5th (overdrive) gear ratio of 0.75 to 1.
^ The front planetary gearset is internally splined to the coast clutch for engine braking.








Planetary Gearset-Forward
The forward planetary gearset is splined to the output shaft.
^ The forward planetary gearset is driven by the forward ring gear when the forward clutch is applied.
^ The forward planetary gearset pinions drive the forward sun gear.
^ The forward sun gear is spliced to the input shell.