I've got a 2000 Lexus LX-470 and I'm about to tow the Feather. LX specs indicate towing capacity 6,500# while the TT is 5,000# dry/empty. LX has a 4.7L 230HP, 320 ft. lb. V-8 with a 4.3:1 rear.
FYI. The set-up works OK. The LX470 isn't overly powered with all we have loaded in the TT and when going up hills I turn off the Overdrive and it's fine.