Reverse Gear Malfunction?
It's not a malfunction- this particular auto's idle rpm speed is low and it simply lacks the power to hold on the gradient of the slope- until of course you step on the accelerator pedal.
There is a very brief lag time from the moment your foot comes off the brake pedal to the time it reaches the accelerator pedal; such that by the time the torque converter is able to "perceive and respond' to your brake pedal to accelerator pedal movements, the car will- by the vary nature of gravitational force move in the direction it is being pulled until a force of equal or greater resistance is applied to either hold it in position or move it in the opposite direction.
By its very definition, a torque converter is a type of fluid coupling that is used to transfer rotating power (the engine) to a rotating driven load (the drive train)- that is the transmission, drive shaft, axle gears, and wheels that the tires are mounted on. [The transverse engine set-up is different than an in-line engine design, but the operating principles are basically the same]..
Automatic transmissions work on the same principle of a water wheel. As the current force of the water drops into the vanes of the wheel, it is converting that water force or pressure into useful forms of power as the wheel spins.
If the current flow of the water is so slow that the paddles of the water wheel are unable to detect any force, the wheel does not move- therefore no power-torque output.
Likewise, if the engine is idling too slow for the vanes in the torque converter to detect any push the transmission into power-torque output, then the car is going to freely go into the gravitational direction of the slope.
Dec 06, 2013 |
Cars & Trucks