Long story short...going on 3d transmission. Replacement again under warranty. How do you make these last? 1st one i flushed every 40,000 at dealer(dead at 100,000) or so. Next one drain and filled ar 30,000 drained again at 65,000 miles(dead just over 100,000 miles. Manual says change 150,000 miles(won't last that long) all highway miles too. How do U get this new one to last?? Thanks for any imput.