Putting trans in neutral and coasting on highway=ruined trans?

[MyMopar]

Having a debate on another board about auto trans and putting them in neutral while coasting.

A member was on the highway and put his trans in neutral (engine still running) doing 80 mph and coasted for 2 miles.  He was concerned about ruining the trans.  This is a modern day trans (2006).

One member said he just disconnected the link from his trans to the engine so he might ruin the trasn for lack of lubrication. 

I chimed in and said that the trans has a pump driven off the converter which has a solid link to the engine.  I can not see any harm being done as fluid is still being pumped through the transmission.

Now this other guy said he will screw it up because the PSI is different.  He said the PSI at idle and PSI at speed are different (which they are) and that it is not going to get the proper lubrication   

I told them that 10 psi or 30 psi it is still being lubricated, the fluid is still flowing, just at a different pressure.  The PSI is what controls the shift points, firmness etc... along with the computer.

So guys what is the real scoop?  I know w/o the engine running and flat towing a vehicle the driveshaft should be removed.

[Bullitt-]

i'm bettin on you...

[360 'CUDA]

Me too
I can't see where that would hurt anything.  The fluid at an idle is still whipping around in there pretty fast.
If you ever had a cooling line break or fall off even at idle the ATF comes shooting out of there.

[MyMopar]

I didn't mention it here but I did tell them the main problem would lie in shifting back into gear under load from neutral, ie neutral drop.  I think that coasting in neutral is no biggie, it is the way back into drive that could be the problem.

[ntstlgl1970]

This would totally depend on the car, what kind of car was it?

Just for perspective, I wouldn't be happy with 10 psi of oil pressure in my engine at 5000 RPM. Parts of that transmission are going whatever RPM corresponds with 80mph while the system provides enough lubrication for cooling and wear protection as if the car was not moving (0 RPM). Not a good combination.