Went for winter checkup (01 Hyundai Elantra GT) at firestone and came back
with a "strong" recommendation to do transmission flush.

Went to a quick oil change place and did a $79.99 Automatic Transmission
Flush.

Now, my friend says Automatic Flush is not a flush and I should have done
a full flush.

Did I do something foolish ? SHould I go back and spend more and do a full
flush?

Thanks in advance