Originally Posted by klw
I have a 2013 Ram Hemi Sport with 6 spd auto trans and 4:10 rear end. It also vibrates when towing my horse trailer. It starts about 40-45 mph, gets worse when I accelerate and not so bad when I let off the gas. Could it be the trans out of balance with the trailer hooked up??? It does it empty or loaded. Trailer weight is 7000 lbs.
Is your trailer aligned with your vehicle? Are your tires both the same pressure? Do you have a weight distributing hitch? There is a lot that can make it shake. I used to have that problem as well, mine turned out to be that the trailer wasn't aligned well with my Ram. I ended up getting a WDH to tow something else and it kinda fixed the problem for me. I went looking around a bit and here is a bit more information on WDH, it might help you with your shaking problem.WDH info