Hi, I own a 2000 volvo s-40 with 229000 miles on it. about 3 thousand miles ago it started downshifting from overdrive into third gear while driving at freeway speeds. Some times it goes back into overdrive, other times I have to pull over and shut the car down to "reset it". I have replaced the relay and pinched the spade connectors to make sure I have good contact on the relay. This has been a great car, I commute 100 miles each way in southern California for work and love this car. Would like to see her to the 300 club. Any help on this would be appreciated.

I also did a drain and fill with amsoil ATF at around 200,000. Not sure if this is part of my problem.

Thanks in Advance.

P