About to come to a stop at a red light coasted a bit before it turned green pushed on the pedal, engine reved but no go. Then it finally engaged and started to go. It didn't engaded hard, it engaged smooth. Took about a second or two. Odd. I know I had some post here about my torque converter engaging on and off while dirving. Not sure, but I might think it has something to do with it. Though it only happend once, it's got me thinking. About 55,000 miles on it. Fluid is nice and red and no burn smell to it. Thought I was going to change it when it warms up a bit. When it started to lock and unlock I added some lube gard to it. Seem to work for a bit now it seems to lock and unlock again. But not as bad before I put in the lube gard.

 

I would drop the pan and see what is in the bottom of the pan