Hi, when I reach 60mph the overdrive begins to play and never get engage. It's not until a long drive that it work properly. Also, when ask for power, you know that after 2500rpm you can fell a shift from the trans converter, mine begin to play too and it doesn't engage.
Mine run in 1900rpm in 50mph in flat and more or less 2200rpm in 60mph. I think is a little high 3000rpm at 70mph, I'm not sure. Thanks for any tip.