Toyota does not recommend "dinghy towing" of any of their automatic transmissions. I have friends who work in the technical center, and they tell me that transmission lubrication of their transmissions depends on the rotation of the input shaft to drive the pump. With the engine off, that doesn't happen.
The Prius is a different animal. Lubrication isn't so much the issue. Parts of its planetary transmission are connected directly to the electric motors. In a sense, it's always in gear. Complicated software makes sure the motors and engine turn in the proper direction and speed for propulsion, engine starting or regenerative braking. The system can't work any of this out while it's being flat-towed--it'd try to recharge the battery the whole time, and overcharge it. I agree--use a dolly.
Source: http://priuschat.com/forums/prius-modifi...
1

0
