I stopped at a light about 5 miles from home and noticed some vibration when taking off. Thought it was just a rough road. By the time I got home the vibration was much worse. Bearings are cool after 60 mile tow in 90 degree heat. Was on vacation last week and noticed a brief screeching sound twice after trailer had set in parking lot all day while I fished, but no squealing when braking, like I would expect if pads were worn and nothing unusual any other time. Can easily push boat in my garage. Springs look OK but obviously I'm not an expert. I'm thinking must be brake problem. The vibration is so bad that hopefullly can get my dealer to come look at it at my house. Will appreciate any ideas re: what's likely the problem. Thanks!