Just bought a new 14' utility trailer last month, single axle with a rear ramp. Brand new got it for $1200. Just got back from a 3500 mile trip with this unit and discovered a little play when I grab the top of the wheels and shake from side to side. It has 15" wheels, no brakes, and a 5-lug pattern. All lug nuts are tight and the play is felt on both wheels. Is this bad bearings or just normal for cheap utility trailer axles?