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A transmission control unit (TCU), also known as a transmission control module (TCM), or a gearbox control unit (GCU), is a type of automotive ECU that is used to control electronic automatic transmissions. Similar systems are used in conjunction with various semi-automatic transmissions, purely for clutch automation and actuation.
The most common wheel speed sensor system consists of a ferromagnetic toothed reluctor ring (tone wheel) and a sensor (which can be passive or active). The tone wheel is typically made of steel and may be an open-air design, or sealed (as in the case of unitized bearing assemblies). The number of teeth is chosen as a trade-off between low-speed ...
The first six-speed automatic was the ZF 6HP26 transmission, which debuted in the 2002 BMW 7 Series (E65). The first seven-speed automatic was the Mercedes-Benz 7G-Tronic transmission, which debuted a year later. In 2007, the first eight-speed transmission to reach production was the Toyota AA80E transmission.
Automated manual transmission. The automated manual transmission (AMT) is a type of transmission for motor vehicles. It is essentially a conventional manual transmission [1][2][3][4][5] equipped with automatic actuation to operate the clutch and/or shift gears. Many early versions of these transmissions that are semi-automatic in operation ...
Class. 4, 5 or 6-speed automatic. Chronology. Predecessor. Chrysler TorqueFlite transmission. Successor. TorqueFlite 8 transmission. The RFE is an automatic transmission family from Chrysler. The name refers to its R ear wheel drive design and F ull E lectronic control system.
Turbo-Hydramatic 3L80 / THM400. Successor. 6L90. The 4L80-E (and similar 4L85-E) is a series of automatic transmissions from General Motors. Designed for longitudinal engine configurations, the series included 4 forward gears. It was the 4-speed electronically commanded evolution of the 3-speed Turbo-Hydramatic 400, first produced in October ...