Power Flow In First and Second Gear

Power Flow in 1st Gear: Drive clutch A is engaged in 1st gear. The sun gear 3 in the double planetary gear train is driven and is meshed with the short planet gears. Due to clutch D being engaged, the double planet carrier is held by the gearbox housing. As a result, the internal drive gear is driven over the long planet gears (large gear reduction) in the direction of engine rotation.




Power Flow in 2nd Gear: Clutch A is also engaged in 2nd gear so that sun gear 3 (4) in the rear gear train is driven. Sun gear 2 (3) in the rear gear train is now blocked by clutch C. The long planet gears and the short planet gears move on rolling contact (reaction) with the fixed sun gear 2 and drive the double planet carrier as well as the internal gear 2 in the direction of engine rotation (gear up - ratio change).