Tranny fluid smells

So, I was changing my torque converter, and I noticed that the fluid smelled burnt. Not many miles on this trans. Maybe 1000.
I know I have to change the fluid, and to check the band adjustment.
My questions are what could cause the fluid to burn in such a short time? I drive like an old man.
What do I need to do now to prevent any issues? Car currently drives fine.
Thanks for any help.