What RPM's do you normally run in OD at 60-70MPH? 3k-ish? Seems high, even though it's got a 4:30 rear.
It's an age old debate. If the OD unit is tough, (which i think this one is, compared), then it should be no problem. When you are in OVERdrive, you are turning less than 1:1 from the motor, which equates to less strain on the motor, and greater fuel economy. If you are stop and go, and under 55, it is a good idea to turn OD off.supraman07 said:isn't it best to not drive your auto supra in overdrive much?