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What is the difference between AMT transmission and AT transmission?

1 Answers

DelMarley

07/29/25 7:06pm

The differences between AT transmission and AMT transmission lie in their transmission forms and functions, as detailed below: Different transmission forms: AT transmission stands for automatic transmission; AMT transmission stands for automated manual transmission. Different functions: AT transmission does not require a clutch for gear shifting; AMT transmission achieves gear shifting through an added microcomputer control system that automatically operates the transmission. Both AT and AMT transmissions belong to the category of automatic transmissions, which are designed to automatically shift gears based on the vehicle's speed and engine RPM, as opposed to manual transmissions. Efficiency differences: AT transmission, due to its reliance on hydraulic torque converter for hydraulic power transmission, has relatively lower efficiency with significant energy loss. Some transmissions now can lock the hydraulic torque converter at high speeds, improving transmission efficiency to a certain extent, but overall, it still falls short of AMT's efficiency. AMT efficiency is equivalent to that of a manual transmission, with high transmission efficiency and minimal power loss. AT transmission is an automatic transmission, with gear positions including P, R, N, D, 2, 1, or L. The advantage of this transmission is its relatively stable technology, while the main drawbacks are higher costs and greater development difficulty. AT transmission consists of components such as the valve body, oil pump, clutch, brake, one-way clutch, diaphragm spring, retaining ring, steel plates, friction plates, large sun gear, small sun gear, planetary carrier, and ring gear. AMT is classified by some manufacturers as an automatic transmission, but strictly speaking, it can only be considered semi-automatic. Cars equipped with AMT no longer require a clutch pedal; the driver only needs to press the accelerator pedal to start and drive the car very simply. This is very important for novice drivers and the overall reliability of the vehicle. Its advantages include simple structure and lower cost, while the main disadvantage is severe gear shift shock. In China, AMT is currently only applied to some A0-level car models. AMT transmission is essentially a manual transmission with automatic clutch and gear shift control functions. Its structure is fundamentally the same as that of a traditional parallel-axis manual transmission, with no essential differences in construction.

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