Around town, I turn the O/D off. i don't see the need for it to keep shifting into O/D, just to shift out again the minute I put my foot on the gas. Once I hit the motorway, or maybe a smaller road but with no traffic or junctions, I click the O/D back in again. I prefer the level of engine braking i get with the O/D off too.
i was trying this around town the other day, and thought it might be a good thing to leave it off, i know to turn it off while towing, i'm guessing if i leave it off around town, it might get me some more tranny life.
I used to switch it. Now I drive a little bit faster and that seems to have stopped all the up and down hunting from O/D. Speed limit around here is 35 mph in residential (type of area I live in), and freeway. By going a little faster than the limit gets me away from the 35 mph shift point. Hence, no hunting up and down.