The phrase "gearshift mechanism" refers to the part or system in a vehicle that allows you to change gears. It enables the driver to switch between different gear ratios, which affects the speed and power of the vehicle. Full definition
In order to achieve this result, Lotus engineers made small but effective changes including the addition of a louvered tailgate panel, a lighter battery, lightweight engine mounts, and lighter HVAC pipework, optimized use of sound insulation and a lightweight center console with a cool - looking exposed gearshift mechanism. (drivemag.com)
From the moment you pull down the gullwing door, everything is unique: the highly stylized interior with its perfect black weave, slivers of titanium, and beautiful exposed sequential gearshift mechanism. (automobilemag.com)
No clutch is required once on the move, and the entire gearshift mechanism — though fully manual in practice — is operated by the main ECU so that the engine and gearbox are protected from erroneous shifts. (evo.co.uk)