Know about your vehicle gear transmission parts

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There are 2 types of transmission systems widely used across the world. First, manual transmission and the second is the auto transmission. In this article, you will be briefed on the manual transmission gear parts. Manual transmission uses a driver-operated clutch engagement for regulating torque from the engine to the transmission and a gear selector operated by hand or foot.

Constituents of the manual transmission gear parts can be divided as follows:


  • Shafts: A rear wheel drive transmission has three shafts: an input shaft, a countershaft, and output shaft.
  • Dog clutch: It provides non- slips coupling of two rotating members. By the means of dog clutch selector locking the output shaft with gear is achieved.
  • Synchromesh: whenever dog teeth make contact with the gear, but the two parts are spinning at different speeds, the teeth will fail to engage and a loud sound will be heard as they clatter together. For this reason, the automobile has a synchronizer or called as synchromesh.
  • Reverse: Forward gear implementation is quite easier but the reverse is quite tough. They are also a pair of gears: one on the countershaft and one on the output shaft.
  • Design variations:
  • Ratio count
  • Gear ratios
  • External overdrive
  • Shaft and gear configuration
  • Freewheeling

Clutch: It is the coupling device used to separate the engine and transmission when necessary. This is because most of the combustion engines continue to run when in use.

  • Float shifting: This is a process of changing the gear without pressing the clutch, usually on a non-synchronized transmission. Float shifting is often done on large trucks with non-synchronized gearboxes.

Gear shift types

  • Floor mounted shifting
  • Column mounted shifter
  • Console mounted shifter
  • Sequential manual


These are the manual gear transmission parts used in any vehicle. I hope this article briefed shortly about the gear transmission parts.

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