Jean

Recently we purchased a 2000 Lexus RX300 and had a trailer hitch installed to pull a pop-up camper. The camper is 1500 lbs not loaded we estimate 2000 lbs loaded and I would stay that is high. We turned off the overdrive to tow per the owners manual. The problem is while towing the car jerks it will stop for a few minutes then do again. Any ideas of why or what we can do to eliminate this problem? Thanks, Jean