low transmission fluid?

To start with, I've got a 04 silverado, 4.3 long bed reg cab w/ 38000 miles

Going in to work today, I had a new problem appear and I want some opinions. At say 55mph, I accelerated. WHen I let off the gas, it would slow maybe 2 mph, then have a slight jerk backwards then level out. I did the same thing, it accelerated, slowdown, lurch. RPM's/tach doesn't do anything abnormal. So clearly something was wrong. I pull into a gas station, check the fluid, and it was definitely low. Very close to the cold fill line, but not quite there. I buy a bottle of fluid (yes, Dextron III was amazingly there), fill er up (took maybe 1pt) and drive away. No more problems. Shifting is smooth.

Is this kind of symptom characteristic of low fluid? I've never actually been in a vehicle when it had low fluid, so I'm curious. Since it dissapeared, I'm assuming it was fluid, but I can't be sure. I'm planning to do an atf change(ok, paying somebody else to do it) in the next two weeks or so anyway, but do you suspect anything is wrong ?

Thanks.

Kinda slow here lateley....... Bump lol

Well, It's been two weeks or so. Fluid level staying steady and it has not done it since. Of course, I only drive it 50 miles a week or so on weekends now that I've changed work arrangements. Ideas??

probably wont help but i had an old monte carlo that would get low on fluid and do something like that. it would also take a lot on pedal and rpm to even make it into first, but that was when it was a quart low. it sounds like a normal problem to me, being low on fluid and if it runs fine now, i would just keep an eye on the fluid level.