Buick Automatic Transmissions Catalog

The Buick automatic transmission is encompassed in the drive train of the car. The primary functions of the drive train are to transmit power from the engine to the drive wheels and to vary the amount of torque. "Power" signifies the rate or the speed at which work is performed. "Torque" is considered to be the turning or twisting force. The maximum power can be provided by the engine at certain speeds, also known as RPM (Rotations per Minute). To be able to use the same engine rpm's at different road speeds, the "gear ratio" of the engine and the drive wheels has to be changed. The transmission allows the gear ratio to be adjusted.

To negotiate each driving situation, the transmission provides the means of changing the ratio between the driving wheel rpm and the engine rpm. Torque is derived from power. The torque which can be derived is in proportion to the distance from the center of rotation at which the power can be applied. By putting gears of different sizes on the crankshaft rotating at any given speed, different results can be obtained. A larger gear will give more speed and less power at the rim in comparison to a small gear. Place another shaft parallel to the driving shaft and install gears on it in line with those on the driving shaft. In this manner any desired combination of speed or power can be obtained which is within the limits of the engine's ability. The transmission does exactly this by using gears and other devices. In an automatic Buick transmission, the mechanism changes on its own. While in the case of the manual transmission you have to shift the gears yourself.

In the case of Buick rebuilt automatic transmission, the mechanism is performed through a system that works by oil pressure. The change of gears is controlled by a shift valve depending on speed, the road, and load conditions. In the case of Buick four-speed automatic transmission, the first gear delivers maximum torque and minimum speed for starting. Fourth gear allows maximum speed with minimum torque for highway travel. The Buick rebuilt automatic transmission is operated by transmission fluid pressure and the shift valves control the gear changes. The shifting of the gears is controlled by a "governor". The governor is turned by the output shaft. The faster the car moves, the faster the governor turns. Oil from the pump is sent to the shift valves by centrifugal force from the governor.

In order to ensure that the Buick rebuilt automatic transmission performs at its very best; all the parts are not only inspected for wear and damage but also cleaned in a special cleaning solution.

We provide Buick rebuilt automatic transmissions at wholesale prices. We have the distinction of holding one of the largest inventories of Buick rebuilt automatic transmissions.