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Driveline shunt occurs when a vehicle gives an abrupt jolt while coming on or off overrun or freewheel. It is caused when the gearbox or other transmission linkages do not immediately relay changes in engine output to changes in wheel speed. There is a very brief delay before the backlash is taken up in a sudden, abrupt manner.
Drivers said the vehicles shudder and shake in higher gears, and hesitate and lurch in lower gears, even after repair attempts. They also accused GM of telling dealers to provide assurance that ...
The 8L 90 is the first 8-speed automatic transmission built by General Motors. It was debuting in 2014 and is designed for use in longitudinal engine applications either attached to the front-located engine [3] with a standard bell housing or in the rear of the car adjacent to the differential (as in the Corvette). It is a hydraulic (hydramatic ...
A dual-clutch transmission (DCT) (sometimes referred to as a twin-clutch transmission) is a type of multi-speed vehicle transmission system, that uses two separate clutches for odd and even gear sets. [1] The design is often similar to two separate manual transmissions with their respective clutches contained within one housing, and working as ...
In 1986, the automatic non-turbocharged version of the Subaru XT was equipped with the first full-time SAWD system, with an electronically controlled version introduced in 1987. Variable Torque Distribution (VTD) AWD was first presented in 1991, with the addition of Vehicle Dynamics Control (VDC) in 1998, allowing for better control of the all ...
Mercedes-AMG developed the 7-speed MCT "Multi Clutch Technology" planetary automatic transmission. The MCT transmission is essentially the 7G-Tronic automatic transmission without a torque converter. Instead of a torque converter, it uses a compact wet startup clutch to launch the car from a stop and also supports computer-controlled double ...
Newer vehicles like Fiesta and Puma use the newer 7-speed PowerShift, while others have reverted to a torque-converter automatic. Volvo Cars While P3 Volvo models using the EcoBoost engine in 1.6T derivatives are equipped with the 6-speed PowerShift, some older P3 platform cars feature the 6-speed PowerShift in 2.0T derivatives (Badged T3 (1.6T ...
Float shifting can reduce clutch wear because it is used so much less (only for starting from a standstill). Conversely, improper engagement of a gear (when the engine and transmission speeds aren't matched) can cause wear on the synchros and lockouts, and damage the gears by physically grinding them together due to a difference in speed.
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