In fully hydraulically controlled transmissions, the driving pattern, that is the timing of upshifts and downshifts, is designed into the transmission and cannot be readily altered.
In the electronically-controlled transmission, the ECU can store different driving patterns.
The driver can select the driving pattern that best suits driving conditions.
"Normal" mode is a shift pattern for city, suburban and highway driving. Gear changes are compatible with both low fuel consumption and good accelerating performance.
In Power mode, upshifts or downshifts occur at higher speeds than in Normal mode. It suits heavy acceleration and brisk driving.
Changes between ratios may also be faster and crisper.
The ECU’s precise control of up- and downshifting to suit driving conditions means less shock going from one ratio to another. The transmission operates more smoothly. It also select the best available ratio for a given condition, which improves fuel consumption.
Anti-squat control can be provided when the transmission is placed in a drive range from the neutral position.
The transmission will engage 2nd or 3rd gear, before shifting into first gear. The input shaft attached to the turbine is still brought to a sudden halt by engaging a drive range, but the shock is absorbed, by successive engagement of the gears.
