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I drive a 2000 Civic with an auto trans. I've been trying ignition off coasting / P&G a bit, and it doesn't seem to be doing anything nasty to the transmission. Here's what I do:
* Build up to 60 MPH (in a 55 zone)
* Put the transmission in neutral
* Turn the key from ON to ACC
* Turn the key back to ON (but not through to START)
* Coast (profit...)
* At 50 or 55 (depending on traffic conditions), turn key to START, engine comes on in neutral
* Shift to drive, extremely smooth, RPMs go from idle at around 800 to around 1800.
My car can be flat-towed for 500 miles when put in neutral from drive. Towing in neutral shifted from reverse is really bad for it. Also, steering doesn't lock unless you go past ACC (to OFF) on the ignition. Power steering goes away unless the engine is running, so there's that. And brakes lock up after 4 or so pumps. Those both come back immediately when the car is turned back on. I am a bit concerned about the starter, and I'm wondering if I can just pop it into Drive to start the engine. I don't really want to try that at highway speeds though...
I'd really like a definitive answer for Honda Civics or any other cars that can be flat-towed. I might just try it and take the risk for a few thousand miles, since I really don't think this is hurting my transmission. But, if I'm wrong, please correct me!
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