SIX-SPEED AUTOMATIC AND MANUAL TRANSMISSIONS

Hyundai's commitment to making the Hyundai Tucson extremely fuel efficient continues with a six-speed automatic transmission with SHIFTRONICЃ manual control or a standard six-speed manual transaxle.

Hyundai's all-new six-speed automatic transaxle helps the company meet its goals of improving fuel efficiency and reducing emissions. Shifts are silky-smooth with an option of manual control through the SHIFTRONIC feature. Designed for transverse engine applications in passenger cars and SUVs, the new compact transmission puts Hyundai into an elite class of auto manufacturers who have designed their own proprietary six-speed automatic transmissions. The strength of the design is its unique layout which makes it smaller, more compact and lighter than any other six-speed on the market today.

For the customer, the new six-speed delivers a performance edge. In this application (FWD/A/T), it helps bring a 24 percent gain in highway fuel economy (31 mpg versus 25 mpg in the '09).

There is no dipstick in the gearbox because it is filled with automatic transmission fluid that is good for the life of the vehicle under normal usage conditions, thereby reducing maintenance costs.

Developed over a four-year period, this new six-speed automatic is 26.4 pounds lighter than Hyundai's five-speed. It also is 1.6 inches shorter and considerably simpler having 62 fewer parts, which is a key to increased durability, lighter weight and lower cost.

When it comes to transmissions, more gears are definitely better. The addition of a sixth gear enables closer spacing between gear ratios providing a better balance of performance and fuel economy while the wide overall gear ratio helps deliver strong acceleration.

The gearbox has three planetary gearsets and a unique flat torque converter which shortens the unit's overall length by 0.47 inches. Four pinion differentials improve durability and further minimize size.

Another example of engineering ingenuity is found in the design of the hydraulic pressure control unit. Because there are always slight manufacturing deviations from one solenoid valve to the next which cause fluctuation in the hydraulic pressure and affect shift precision and quality, the transaxle features cleverly integrated adjustment screws in the valves which enable each of the eight valves to be calibrated at the factory. This feature ensures stable hydraulic pressure at any shift point which facilitates a high degree of precision and control needed to deliver fast, smooth and precise shifts throughout the rpm range.

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