I've got close to what's being recommended: 2016 1500 Crew Cab, hemi, RWD, 3:92. I tow a 6400 lb. 29 ft. toy hauler with no sway or problems over 70 mph, ( I don't cruise that fast but have been up there briefly) and plenty of power. What's crucial is how I LOAD the trailer. I have quite a bit of stuff in the "basement", which is up front right behind the hitch and loads up the tongue directly. The more weight I put in the "garage", the area behind the axles, the less weight I put on my RAM's rear axle, even though the trailer's gross weight increases. Without any toys in the garage, I'm within 280 lbs. of the GAWR on the rear axle, so a passenger or two puts me right at the limit. But with a few hundred pounds of bikes in the garage, my tongue weight decreases and I can carry more payload. I'm using a good, properly adjusted WDH (Husky Centerline). Hope this helps!