I changed mine tonight too. I had an hour and a half drive from Napa to home, so the oil was nice and hot, good for a change. I covered the subframe with aluminum foil to keep the oil from splashing all over it, but it still made a huge mess. I even let it drip from the drain bolt for a good 10 minutes before I completely removed the plug. It kept up a pretty steady stream, but as soon as I removed the plug it gushed out everywhere. Thankfully the aluminum foil did keep the oil off the subframe, so the only thing to clean up was the floor. Man, what a mess!
I'll have to take it for a spin and see if third gear is still cantankerous. I hope it will work better now. FWIW, it took a little less than 3 quarts, but it was easy to do other than the spillage.