OK, so this morning it happened again on my way into work. It seems to always be the 2nd to 3rd shift (about 20mph), and it seems to do it mostly after a quick downshift while decelerating then accelerating again in typical crappy Chicago traffic. I was in Power Mode.

When I noticed it, I quickly pulled over, turned off, and restarted again. I turned Power Drive off, and after doing this I had no problem for the remainder of my drive.

When I had the oil changed, I believe they checked the tranny fluid level and it was fine. I will make a point to check it again however.

Other than that, my truck only has 26,500 miles, but could it still be the mode selector? I suppose it wouldn't hurt to change it out for a new one???

0_o Bart