Hello everyone! I'm new to Subaru, but just picked up a '95 legacy wagon w/93,000 and I'm wondering if any good or harm is done to the Tranny if I select "3" instead of D when tooling around town at 40mph and under? Would it save some internal componants from locking/unlocking as we drive at a speed where Overdrive 4th would engage? Is the 4th gear ratio an overdrive? In this gear, does the torque converter lock up above a certain speed? Thankyou for responding. John