2008 chevy aveo 5 speeds manual

The reason Dawoo/GM Korea says not to tow four down may have nothing to do with transmission lubrication. There could be other chassis issues (like accelerated front end wear or tire wear) that have potential to raise warranty claims.

I wouldn't do it myself
bumpy

I may be wrong, but I would think that running the car while towed could do some real damage to things like power steering, power brakes. Not sure how a supplemental braking system (which is required in most states) would work if the cars brakes were active.