One of my friends replaced his Tracker (after rolling it and having it totalled) with a used HHR. It met similar size and transportation needs, except for off-roading, and he had not been doing that with the Tracker anyway.
There are a lot of older small towable vehicles with automatics, including most of the GM compacts (HHR, Colbalt, Cavalier, G6, etc) but they might be a bit heavier than your Tracker, depending on which Tracker you had.
I'm towing a Honda Fit, base model about 2500# with manual transmission, but the automatic is also towable, or will be until they start coming with the CVT instead of the 5-speed auto.