: The most common cause is transmission fluid dripping onto the hot exhaust pipe, which creates thick white or light grey smoke.
: Fluid that has turned dark brown or black and smells like burnt toast has lost its ability to lubricate, leading to rapid internal disintegration. Key Warning Signs smoking tranny
: If fluid is low or degraded, internal components (clutches and bands) creates excessive friction, potentially causing smoke to vent from the dipstick or overflow tube. : The most common cause is transmission fluid