That would be about ideal for an O.D. ratio for the freeway with 3:55s or similar. My 6th is .5 and it's just a fuzz to much, it's right around 1,700-1,800 rpm at 70 mph, I'd like to be closer to 2,000 rpm.Going with the .64 5th vs .82 current. Car walks off 900 rpm so cruise ahould be lower rpm freeway. Capacity for Tremec is 2.7 quarts which had previously been a mystery. Recommended synthetic blend fluid, and first 500 break in oil.