As the motor turns and the vehicle moves forward the transmission is actively changing the output speed while allowing the motor to operate within its niche power band. The transmission is comprised of various gears that extend the input power from the motor allowing the wheels to turn at vary speeds while the motor stays more or less within a fixed rotation.
In short the transmission allows the vehicle to posses the ability to accelerate and decelerate at a constant controlled pace so that outpower isn't lacking while the motor is not over-worked. The transmission turns the axle shafts which turn the wheels and give the car motion. An automatic transmission accounts for gear changes up and down automatically, while a manual transmission is just that it requires manually shifting through the gears. Inside your transmission there is transmission fluid which like engine oil keeps the moving pieces lubricated and reduces friction.
Every 12- 18 months fluid inspection is recommended to ensure that these sophisticated parts do not get worn, or fluid fouled. Pulling a trailer can be more strenuous on a transmission system and as such proper towing practices, gear selection and maintenance should always be followed. Along with the main drive wheels in the front some vehicles have only rear drive wheels and lastly there are vehicles which have all wheel drive wheels. These options require a differential gear which is also fed by the transmission via a drive shaft that extends its reach all the way to the rear of the vehicle. This component is similar to the main transmission as it posses several gearings. Differential gears need to be inspected and serviced just as frequently as the transmission itself as it is also lubricated with special oils. It is our goal that your transmission runs smoothly through all of its gears, up and down!