Towing Issues: Broken Transmission, lexus rx300, transmission engineer

Question
How Bad could be...? to Tow an AWD Lexus RX300 with a non shifting
Transmission either Forward not Backward that means BROKEN but not Frozen
with a regular Two point road bar, meaning rolling the vehicle in "N" for a 5 mile
ride.

Answer
I would think catastrophic but I'm not a Lexus transmission engineer. Towing speed would also be a factor. The faster the parts are spinning in the transmission the more internal fluid pressure and heat is generated. Since the pump in the transmission isn't working some parts could be starved for lubrication. I suggest a transmission flush and or filter change if equipped and hope for the best.