Borg-Warner 35 transmission

The Borg-Warner 35 transmission (BW-35) is an automatic transmission produced by the BorgWarner company.

It has three forward and one reverse gears. The selector lever follows a quadrant which has six stations (Park, Reverse, Neutral, Drive, Second gear and First gear). The "3" in the model number refers to the number of forward gears.

Description

When the transmission of the motionless vehicle is placed in Drive, the transmission allows the vehicle to move off in first gear, then will change to second and then to third gear based on increase in road speed. The BW-35 will downshift from third to second and from second to first, also based on load. The transmission is equipped to produce kickdown and will upshift after kickdown if accelerator pressure is released following a kickdown.

As is common in automatic transmissions of its generation, power brought to the transmission via the torque converter drives hydraulic fluid. As the gears move faster or slower, pressure of the fluid increases or decreases in the case. Mechanical switching of gears is triggered by the increase or decrease of pressure. There are no electronic sensors or switches as found in modern transmissions.

The Borg Warner 35 automatic transmission comprises a torque converter and a fully automatic 3-speed hydraulically controlled epicyclic gear box. The automatic transmission provides three forward and one reverse gear ratio.

The hydraulic control system consists of a valve arrangement and an engine...
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