Most manufacturers provide specific schedules for transmission fluid flushes and replacements. A transmission flush is a ...

He notes that it’s important that someone use the correct transmission fluid during a flush as “different transmissions take different fluid.” Transmission flushes are a controversial topic ...

If it's beneath them, a top-up or flush could be in order; the same if the fluid is gritty or dark. To add extra transmission fluid, you can simply use a funnel while the dipstick is removed.