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The dual-clutch transmission DQ200 of the Volkswagen Group was the subject of recall actions in several countries due to technical problems. [55] In 2009, 13,500 vehicles with DQ200 were recalled in the USA due to issues and sent to workshops.
2005–2007 ZF-Batavia CFT30—Continuously variable transaxle (CVT) Ford Freestyle, Ford Five Hundred, Mercury Montego; 2005–2016 6R 60 ZF longitudinal 6-speed transmission Ford Falcon (BF, FG) Ford Territory (AWD) 2006-2009 Ford FNR5 transmission - A 5 speed automatic from Mazda, uses Ford FNR5 fluid Ford Fusion, Mercury Milan
The Toyota K CVT transmission is a series of continuously variable transmissions (CVT) found in many Toyota and Lexus automobiles. The transmissions are manufactured for the company by Aisin , an automotive parts manufacturer that is part of the Toyota Group of companies.
A cone CVT varies the drive ratio by moving a wheel or belt along the axis of one or more conical rollers. The simplest type of cone CVT, the single-cone version, uses a wheel that moves along the slope of the cone, creating variation between the narrow and wide diameters of the cone. Some cone CVT designs use two rollers.
If the transmission control unit senses a critical fault during driving, it will activate an emergency operating mode: Upon hydraulic failures, it will stop shifting gears and permanently retain the currently selected gear; if the failure can be pinpointed to one of the internal hydraulic control valves, the transmission will continue shifting but stop using the affected gear(s).
A direct-shift gearbox (DSG, German: Direktschaltgetriebe [1]) [2] [3] is an electronically controlled, dual-clutch, [2] multiple-shaft, automatic gearbox, in either a transaxle or traditional transmission layout (depending on engine/drive configuration), with automated clutch operation, and with fully-automatic [2] or semi-manual gear selection.
This design is also noteworthy because it preserves engine braking by eliminating a sprag between first and second gears. Instead of a sprag or roller clutch, Honda's older transmissions rely on pressure circuits to modulate line pressure to change gears.
A continuously variable transmission (CVT) can change seamlessly through a continuous range of gear ratios. This contrasts with other transmissions that provide a limited number of gear ratios in fixed steps. The flexibility of a CVT with suitable control may allow the engine to operate at a constant RPM while the vehicle moves at varying speeds.