[wagonman76]

Youd just have to try it, its probably different with every car. I know mine does not like shifting from neutral back into gear at anything above say 25 mph. Even trying to match revs doesnt cut it. It takes at least 5 seconds for it to make up its mind to get in the right gear and get the TCC relocked, and by them Im sure Ive lost efficiency as well as trans life. So I only idle in neutral when Ive got some good distance coming up to a stop sign or sharp corner.