Originally Posted by Eugene The Jeep
I don't think my sport mode even functions properly. All that it seems to do is hold the gear for an unusually long period of time. So RPMs will be high, but there isn't an upshift where and when you'd expect it. Just love that my $42k car drives like its being operated by someone learning stick shift for the first time.
Well that is what Sport mode does, so it sounds like its working. By holding higher revs it is accessing more power. It also reduces traction control, and pushes more power to the rear wheels.
The torque converter introduces a bit of lag, particularly at take off, and particularly when its cold. It just takes a while to bind up when its cold.
I haven't met a perfect auto trans that shifts when I would expect it to shift. Its always more noticable at low speeds when you are trying to build momentum, more so than at higher speeds when momentum is already there. My old landcruiser would always pick the wrong gear at a certain speed on a certain corner just down from my house. Drove me nuts.
Interesting that your wifes car doesn't have the same characteristics as your car. I guess it could be the learning, you could ask the dealer to reset it to relearn.
There's a bit of info in this TSB: