Is a 6-speed manual-automatic transmission the same as a 6AT?

[SanBrandon]

A 6AT can include a 6-speed manual-automatic transmission, but a 6-speed manual-automatic transmission is not necessarily a 6AT. A 6-speed manual-automatic transmission refers to a gearbox that combines six-speed manual and automatic shifting functions, but it is not necessarily an AT transmission. It could be other types of transmissions, such as dual-clutch or CVT. An AT transmission refers to a specific structural type of transmission, while a manual-automatic transmission indicates that an automatic transmission has manual shifting capabilities. However, this manual shifting function does not necessarily mean it is an AT transmission; it could be a dual-clutch or CVT. AT stands for torque converter transmission, and automatic transmissions also include AMT, DCT, and CVT. AT transmissions are the most mature and widely used type of transmission. AT transmissions have minimal shift shock during gear changes, while dual-clutch transmissions exhibit noticeable jerkiness during low-speed shifts. AMT transmissions have significant shift shock and have largely been phased out. The development and manufacturing costs of AT transmissions are generally high, and they are often used in high-end vehicles. A manual-automatic transmission combines manual and automatic shifting modes. This type of transmission integrates the advantages of both automatic and manual transmissions, minimizing power loss in the shifting system. Manual mode allows drivers to freely adjust gears and RPMs based on their preferences. Unlike pure manual transmissions, manual-automatic transmissions have a clutch mechanism but do not require manual operation by the driver—it is automated. When using manual mode in a manual-automatic car, the driver simply shifts to manual mode and adjusts the gears up or down as speed changes. If the speed does not match the selected gear, the transmission will automatically downshift. If the speed exceeds the current gear, the driver must manually upshift. Working Principle: Structurally, a manual-automatic transmission mainly consists of a standard gearbox (similar to a manual transmission), an electronically controlled clutch, an automatic shift mechanism, and an electronic control unit. The electronically controlled clutch automatically engages, disengages, or partially engages the clutch as needed. During operation, the transmission ECU controls a stepper motor to move the clutch fork, engaging or disengaging the clutch. The automatic shift mechanism automatically selects the appropriate gear, typically using two stepper motors controlled by the transmission ECU. The gear lever setup is similar to that of a conventional automatic transmission, with no clutch pedal. The transmission essentially uses automatic control to simulate manual shifting. Under normal driving conditions, it operates similarly to a hydraulic automatic transmission. However, when parked, the clutch is disengaged, so the driver must apply the brakes on slopes to prevent rolling. In manual mode, the driving experience resembles that of a manual transmission, with direct power delivery and no need to operate the clutch. Additionally, drivers can skip gears when shifting up or down.

[RileyLynn]

I always enjoy studying transmissions while driving. The 6-speed automatic manual transmission is indeed what people commonly refer to as a 6AT, but it has an extra hidden feature! A regular 6AT only handles gear shifts automatically, while models with automatic manual transmission always have paddle shifters hidden behind the steering wheel or next to the gear lever—just a flick of the finger lets you manually control upshifts and downshifts. Last month, I tried this feature while driving a friend's SUV on mountain roads. During a long downhill stretch, manually dropping two gears made the engine braking effect particularly noticeable, reducing strain on the brake pads. Although the core technology is still that 6-speed automatic transmission, adding this manual mode is like installing a control switch for an automatic car. It even allows you to deliberately delay shifting to higher revs for extra power when overtaking.