Hi, Is the air pressure the same? If so, I'd jack it up and check the bearings and ujoints. When it's jacked up and clearing the ground, give the wheels a turn by hand and try to wiggle them. See how much of a time lag there is when you begin turning the wheel and when the ujoints engage. It will also be easy to listen for noises since the engine will be off. I hope it is a minor thing. This is how I check mine, which is the old style . What year model is yours? bordercollie