 Read the unreasonable owners manual about towing anything. Don't go over 65, don't use cruise control, don't just put it in drive--you must use Sport mode--and you will NEVER see 6th gear, don't expect to get better than 11.5 MPG towing a 2,000 pound trailer, do  put it into ECM mode (it changes shift points), be prepared for the trans to stay in a high gear long after you've crested a hill, don't expect Toyota to do anything even if you complain to the Toyota headquarters, they make NO CLAIMS about the performance while towing.