I have an 05 taco prerunner, everything factory, it has the alumiinum 16" port wheels and factory dunlop grantrek tires. It has had this prob. for a while and the dealership has balanced them and it will do ok for a month or 2 and then it will return. At certain speeds, the steering wheel will start to shake, an wiggle, is this a balance prob. an alignment prob, or just a crappy tire prob.? anyone else had this happen with their tacomas? Any help would be appr.