what is difference between AT and FAT transmission??

civic2281 · Postby **civic2281** » November 27th, 2012, 9:43 pm

what is difference between AT and FAT transmission??

and which 1 is better.

DjDaniel · Postby **DjDaniel** » November 28th, 2012, 7:45 am

Well I believe a FAT transmission really just stands for Fully Automatic and AT is just plain Automatic.

> Difference is a FAT transmission just to put in D and the transmission would do everything whereas AT transmission could be shifted as in most cars/ sports cars today.

> Which one is better? Depends on what the driver likes, If you just prefer to have somewhat input on what gear the engine is running on, go for the AT else if you like to just leave the car in a gear and drive, consider the FAT.

Sundar · Postby **Sundar** » November 28th, 2012, 9:37 am

FAT refers to Floor Automatic Transmission while AT means Automatic transmission in case where shift lever is installed at the steering column

Sundar · Postby **Sundar** » November 28th, 2012, 9:42 am

i google searched and got this from wikipedia - An automatic (also called automatic gearbox, or auto transmission) is one type of motor vehicle transmission that can automatically change gear ratios as the vehicle moves, freeing the driver from having to shift gears manually. Most automatic transmissions have a defined set of gear ranges, often with a parking pawl feature that locks the output shaft of the transmission.
Similar but larger devices are also used for heavy-duty commercial and industrial vehicles and equipment. Some machines with limited speed ranges or fixed engine speeds, such as some forklifts and lawn mowers, only use a torque converter to provide a variable gearing of the engine to the wheels.
Besides automatics, there are also other types of automated transmissions such as a continuously variable transmission (CVT) and semi-automatic transmissions, that free the driver from having to shift gears manually, by using the transmission's computer to change gear, if for example the driver were redlining the engine. Despite superficial similarity to other transmissions, automatic transmissions differ significantly in internal operation and driver's feel from semi-automatics and CVTs. An automatic uses a torque converter instead of clutch to manage the connection between the transmission gearing and the engine. In contrast, a CVT uses a belt or other torque transmission scheme to allow an "infinite" number of gear ratios instead of a fixed number of gear ratios. A semi-automatic retains a clutch like a manual transmission, but controls the clutch through electrohydraulic means.
A conventional manual transmission is frequently the base equipment in a car, with the option being an automated transmission such as a conventional automatic, semi-automatic, or CVT. The ability to shift gears manually, often via paddle shifters, can also be found on certain automated transmissions (manumatics such as Tiptronic), semi-automatics (BMW SMG), and CVTs (such as Lineartronic).
The first automatic transmissions were developed by General Motors during the 1930s and introduced in the 1940 Oldsmobile as the "Hydra-Matic" transmission. They were incorporated into GM-built tanks during WW-II and, after the war, GM marketed them as being "battle-tested".