Originally Posted by n0rt0npr0
Maybe only in the 2000 years and up range.
My 89 celeb, 93 prizm, 96 monte, 97 cutlass all do very very well with EOC'ing
I did say "typical."
I'm not a transmission guy by any stretch, but according to other GasSavers older transmissions had a different pumping system that didn't rely on engine drive for lubricant circulation and could safely EOC. Saturns (at least some models) are fine with it as well.
As I understand it though, the majority of vehicles these days would be at risk. Surprisingly, the manual for my VW specifically
Coasting downhill with the transmission in Neutral and the engine not operating will result in damage to the Automatic transmission.
You suppose they've had some bad experiences with hypermilers?
The post that mentioned it said "we" EOC, which could be misinterpreted to mean all hypermilers do. I'd rather see this issue raised so newcomers will either err on the side of caution or research whether it's safe for their particular vehicles, than for them to not realize there's a risk and potentially do damage to their transmissions.
Out of curiosity, what do the manuals for the four vehicles you listed say about flat towing?