I have a 2002 Buick LaSabre and own a 1984 Beretta. The trailer is dual axel and has a tongue weight of about 40 lbs. The trailer is rated for 4,500 lbs. I put a hitch on my Buick and tow my boat. I live by the lake and launch the boat each time I use it and never go over 35 mph. Does any one...