300 miles ago I put Type F in my '51 Merc-o-matic. It seemed good and the upshift and downshift while cruising was ok but once the trans was nice and warmed up it went hard into reverse and drive while stopped (pulling out of parking spots).
Friday I did a drain and fill and put in Dexron 3 and it shifts MUCH better.
There was quite a bit of swarf on my magnetic drain plug from using type F. I'm glad I didn't leave it in there for longer.
