i am using a 2013 XLT cargo for my business. I bought it new and currently have 52,000 miles on it. I do considerable highway driving between San Diego and Las Vegas. When on that road I have to make a steady climb from 1000 elevation to just over 4600 ft. I have MUCH trouble keeping at highway speed climbing that hill. I have to take it out of overdrive and still can't go 50 MPH. It is beyond annoying! A friend of mine suggested I find a performance chip of some kind and an upgraded torque converter to help relieve this problem. Has anyone out there done something like this? I am sure there are many Transit owners who have similar issues. In my opinion the tranny is not properly geared with this small 4 cal engine, which is why so many have to replace them well below the time they should have. Anyway, I would appreciate any assistance you may have!