How does your transmission shift? Are the shifts soft and laggy when warm? IE, it goes to change gears and it doesn't flare but kinds hangs for a few seconds before it goes into the next gear? We purchased our 06 sienna (2nd gen is 03-08, 07-08 use the 3.5 and diff trans) last year with 83 K miles on it. It's always shifted great when cold, crisp quick shifts. After ~15-20 miles or 30 minutes of driving it starts to get sloppy-laggy-lazy shifts. Right when I got it I did a few drain and fills with Toyota T-IV fluid as the fluid was a little dark. Nothing abnormal on the drain plug magnet, just a little fuzz. Measured the exact amount I drained and refilled with the same. Checked the level after with engine running, hot and in park. It's exactly at the top of the hot marker so the level is spot on. A few weeks ago (I'm at 93K miles now) I was reading through the Sienna forums seeing if this was normal. Most posts said they had improved shift feel with Valvoline Maxlife ATF. I did 3 consecutive drain and fills in the same day with a short drive in between. The fluid is nice and pink, again correct level when hot. The shift quality has improved a little. It's not quite so laggy, but it's still not up to my liking. Thoughts?