It is generally accepted wisdom that it is a bad idea to coast or glide a car equipped with a conventional hydraulic automatic transmission. Coasting (running with an idling engine that is disconnected from the drive train) is said to be at best unnecessary, and at most causing increased wear. Gliding (running with the engine turned off) is said to damage the transmission due to lack of lubrication because of the oil pump not working. For the same reason towing of automatic transmission vehicles over longer distances is said to be damaging.
Now it happens that some modern hydraulic automatic transmissions offer automatic coasting and gliding. For example, this description of PSA's EAT8 states that it supports coasting (between 20 and 130 km/h) and gliding (up to 20 km/h). How is this realized mechanically? The EAT8's oil pump being conventionally powered by the engine (as can be seen on the exploded view under the above link), does this mean that there exists an additional clutch to fully disconnect the drive train from the transmission or that some other measures where taken to limit the negative effects?
A PSA press note clarifies that "free wheeling" in the EAT8 gear box is in fact coasting: "returns the engine to idle and disengages the gearbox with each lift of the foot off the accelerator for speeds between 20 and 130 km/h"
A response on quora contains a slide from a PSA presentation on the same topic.