The transmission system is the heart of the vehicle, transmitting power from your engine to every wheel. It must be in good shape for everything else to work. It includes a clutch, gearbox, propeller shafts, universal joints, rear axles which connect all of these pieces together so they can spin smoothly without grinding against each other; and tires!

The clutch initiates transfer from the engine by connecting with either one or more gears in order to change speeds as needed for different situations such as climbing hills vs going downhill; taking off versus cruising at highway speed; accelerating quickly or slowly etc., while also giving an “upshift” when necessary so there’s always enough revolutions per minute/second even if the vehicle is stopped – which can help retain traction against slippery surfaces like snow-covered roads.

Automatic Transmission

In an automatic transmission system, gears are changed by a torque converter or planetary gearset. The advantage of an AT is that it allows the engine to run at optimum speed for fuel economy as well as low noise and smooth shifting. 

The driver of an automatic vehicle can only select one gear at a time; the driver has no control over which gear will be selected next, so the power delivery is not optimal for any given situation. The driver cannot manually override the system if he detects a problem because there is generally no clutch pedal.

Automatic Transmission Stages

  • Park – locks transmission, restricting vehicle from moving
  • Reverse – puts vehicle in reverse gear, allowing vehicle to move backward
  • Neutral – disconnects transmission from the wheel
  • Low – allows vehicle to be operated at a lower speed
  • Drive – allows the vehicle to move and accelerate through a range of gears.
Transmission repair at Ray Roach Service Center, car repair in Saint John, NB. Quality and trustworthy Saint John Auto repair. The best mechanic in Saint John.

Manual transmission system

In a manual transmission system, the driver has to manually select and engage the gear ratios.

The standard manual transmission has three forward gears and one reverse. It is a very simple, low-cost design, which makes it reliable and popular for basic automobiles. The most used version of the manual transmission is known as the conventional manual transmission . A conventional gearbox always has a mechanical advantage , which means that if no force acts on the shaft, it will turn at twice the rotational speed of a passive input—the gearing inside a manual gearbox.

Manual Transmission Stages

  • Clutch fully depressed – disengages the clutch allowing for gears to be changed
  • Clutch slips – used to start the vehicle then allows engine rotation to adjust to newly selected gear ratio
  • Clutch fully released – allows clutch to be fully engaged resulting in power being transmitted to the wheels.

Automated Manual Transmission

An alternative layout is called an automated manual transmission or AMT. AMT’s are always attached to an engine such as a diesel or petrol engine and offer better economy than automatics because they do not have to shift up and down through the gears.

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