CALL US NOW FOR MORE INFORMATION

713-675-5556 Address: 513 McCarty St, Houston, TX 77029

Blog:

​Transmission

01-14-2018

Photo Credit: By falco on Pixabay. CC0 License.

A transmission is a machine in a power transmission system, which provides controlled application of the power. Often the term transmission refers simply to the gearbox that uses gears and gear trains to provide speed and torque conversions from a rotating power source to another device.

In British English, the term transmission refers to the whole drivetrain, including clutch, gearbox, prop shaft (for rear-wheel drive), differential, and final drive shafts. In American English, however, the term refers more specifically to the gearbox alone, and detailed usage differs.

The most common use is in motor vehicles, where the transmission adapts the output of the internal combustion engine to the drive wheels. Such engines need to operate at a relatively high rotational speed, which is inappropriate for starting, stopping, and slower travel. The transmission reduces the higher engine speed to the slower wheel speed, increasing torque in the process. Transmissions are also used on pedal bicycles, fixed machines, and where different rotational speeds and torques are adapted.

Often, a transmission has multiple gear ratios (or simply "gears") with the ability to switch between them as speed varies. This switching may be done manually (by the operator) or automatically. Directional (forward and reverse) control may also be provided. Single-ratio transmissions also exist, which simply change the speed and torque (and sometimes direction) of motor output.

In motor vehicles, the transmission generally is connected to the engine crankshaft via a flywheel or clutch or fluid coupling, partly because internal combustion engines cannot run below a particular speed. The output of the transmission is transmitted via the driveshaft to one or more differentials, which drives the wheels. While a differential may also provide gear reduction, its primary purpose is to permit the wheels at either end of an axle to rotate at different speeds (essential to avoid wheel slippage on turns) as it changes the direction of rotation.

Conventional gear/belt transmissions are not the only mechanism for speed/torque adaptation. Alternative mechanisms include torque converters and power transformation (e.g. diesel-electric transmission and hydraulic drive system). Hybrid configurations also exist. Automatic transmissions use a valve body to shift gears using fluid pressures in conjunction with an ecm.

Early transmissions included the right-angle drives and other gearing in windmills, horse-powered devices, and steam engines, in support of pumping, milling, and hoisting.

Most modern gearboxes are used to increase torque while reducing the speed of a prime mover output shaft (e.g. a motor crankshaft). This means that the output shaft of a gearbox rotates at a slower rate than the input shaft, and this reduction in speed produces a mechanical advantage, increasing torque. A gearbox can be set up to do the opposite and provide an increase in shaft speed with a reduction of torque. Some of the simplest gearboxes merely change the physical rotational direction of power transmission.

Many typical automobile transmissions include the ability to select one of several gear ratios. In this case, most of the gear ratios (often simply called "gears") are used to slow down the output speed of the engine and increase torque. However, the highest gears may be "overdrive" types that increase the output speed.

Latest Posts

Fuel Saving Tips
11-08-2018

Choosing a Car Navigation System
10-22-2018

Car and Truck Paint Care
10-08-2018

Most Wanted Accessories for Cars and Trucks
09-24-2018

​Driving Safety
09-10-2018

​Retreading Tires Makes Sense
08-27-2018

Defensive Driving
08-13-2018

​Tires for Cars and Trucks.
07-28-2018

​Automotive Paint and Body Repair
07-16-2018

​Car and Truck Leasing
07-02-2018

​Buying a Used Car or Truck Online
06-18-2018

​Car Roof Boxes and Racks or Cargo Carriers
06-07-2018

Pressure Does Matter
05-18-2018

Where To Buy The Cheapest Auto Parts
05-07-2018

Famous quotes about Cars, Drivers and Driving
04-12-2018

​Tire Pressure Does Matter
04-05-2018

​History of Pickup Trucks
03-23-2018

​Auto and Truck Financing
03-08-2018

Roadside Assistance
02-22-2018

​Semi-Truck Accessories Are Your Best Advertisement
02-14-2018

​List of Vehicle Instruments
02-07-2018

​Exhaust System
02-01-2018

​Tire Pressure Monitoring System (TPMS)
01-25-2018

​Transmission
01-14-2018

JB Tire Shop Center Houston
12-28-2017

Brake lining
12-20-2017

​Auto Accident Checklist
12-13-2017

​Automotive Battery
12-07-2017

​Vehicle Inspection
11-29-2017

​Detailing your Car Wheels
11-24-2017

​Truck Drivetrain
11-15-2017

​What is a Mudflap For?
11-07-2017

​Semi-Trailer Truck
11-01-2017

​Retread Tires
10-25-2017

The Schrader Valve
10-17-2017

​Formula One Tyres
10-09-2017

​Rolling Resistance and Tires
10-02-2017

​Central tire inflation system
09-26-2017

​Road Signs and Signals
09-18-2017

Importance of Wheel Alignments
09-12-2017

​Car Detailing Tips: How to Wash-Dry your Car
09-05-2017

​Types of Recreational Vehicles
08-31-2017

​Detailing your Car Wheels
08-24-2017

​5 Facts You Didn’t Know About Your Tires
08-14-2017

​Eight Things You Should Know About Tires
08-07-2017

​5 Tips for Tire Care and Stay Safe on the Road
07-24-2017

​Types of Trucks and Trailers
07-17-2017

​Which Way to Slide your Tandems?
07-10-2017

Facts About Trucks
07-03-2017

​How Important is Tire Pressure?
05-16-2017